Geometry
Teacher
Ser
ies
F
Copyright © 2009 3P Learning. All rights reserved.
First edition printed 2009 in Australia.
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ISBN 978-1-921860-97-3
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Contents
Topic 1 – Lines and angles (pp. 1–6)• review ______________________________________________
• introducing angles _____________________________________
• measure and construct angles up to 90° using a protractor _____
• me passes – inves gate ________________________________
Topic 2 – 2D shapes (pp. 7–15)• dis nguish among polygons, regular polygons and
other two-dimensional shapes____________________________
• quadrilaterals _________________________________________
• iden fy triangles ______________________________________
• circles _______________________________________________
• circle sense – apply ____________________________________
• how many triangles? – inves gate ________________________
Topic 3 – Transforma on, tessella on and symmetry (pp. 16–24)• symmetry ____________________________________________
• transforma on ________________________________________
• tessella on ___________________________________________
• tessellate and create – create ____________________________
• dig it, Dr Jones – create _________________________________
Topic 4 – 3D shapes (pp. 25–34)• introduc on __________________________________________
• polyhedrons __________________________________________
• spheres, cones and cylinders _____________________________
• drawing 3D shapes _____________________________________
• nets ________________________________________________
• 2 halves make a whole… – apply __________________________
• tomb raider – inves gate _______________________________
Date completed
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Series F – Geometry
Series Authors:
Rachel Flenley
Nicola Herringer
Copyright ©
Series F – Geometry
Series Authors:
Rachel Flenley
Nicola Herringer
Contents
Sec on 1 – Answers (pp. 1–34)• lines and angles _____________________________________ 1
• 2D shapes __________________________________________ 7
• transforma on, tessella on and symmetry _______________ 16
• 3D shapes __________________________________________ 25
Sec on 2 – Assessment with answers (pp. 35–48)• lines and angles _____________________________________ 35
• 2D shapes __________________________________________ 37
• transforma on, tessella on and symmetry _______________ 41
• 3D shapes __________________________________________ 45
Copyright ©
SERIES TOPIC
1F 1Copyright © 3P Learning
Geometry
See if you understand these terms by comple ng this quick test. Draw:
Follow the instruc ons and fi ll in the missing informa on:
a Look at the horizontal line in the box below. Horizontal lines lie fl at standing up ( ck one box). We call the line AB as it starts at A and ends at B.
b Draw a 5 cm ver cal line up from point A. What kind of angle is formed by thetwo lines at A? ______________
c When two lines meet in such an angle, we say that they’re perpendicular to eachother. Draw another 5 cm line up from B. Is this line perpendicular to Line AB as well? ______________
d Now look at lines AC and BD. Are they perpendicular or parallel to each other? ______________
e If you said parallel, you’d be right. Parallel lines are always the same distance away from each other at any point and can never meet.
f Draw a line that is parallel to line AB by joining CD.
g Curves can also be parallel. Draw 2 parallel curves in the shape.
When we classify lines we use terms such as parallel, perpendicular, ver cal and horizontal.Knowing these terms makes it easier for us to understand and work with shapes.
Lines and angles – review
1
2
A B
C D
a 2 parallel lines b 2 lines perpendicular to each other
c a horizontal line d a ver cal line
right angle
yes
parallel
SERIES TOPIC
F 12Copyright © 3P Learning
Geometry
A circle is a full turn and is 360°. Think of it as a clock – from 12:00 round to 12:00. Copy this page and then cut out the circle below and try the following:
a Fold the circle in half. How many degrees are in a half circle? ___________________
b Fold it in half again. You now have a quarter circle. How many degrees are in a quarter of a circle? ___________________
c Fold it in half once more. You have an eighth of a circle. How many degrees are in one eighth of a circle? ___________________
What is an angle?Look at where these two lines meet. The angle is the amount of space between where they join. It’s also the amount of turn between them.
If we imagine that these two lines are joined at their mee ng point, we could rotate the lines around this point. They’ll stay joined but the amount of turn will change.
We measure angles using degrees – the symbol for this is °. We use a protractor as our measuring tool.
Lines and angles – review
3
FOLDFOLD
FOLD
FOLD
FOLD
FOLD
FOLD
FOLD
copy
180
90
45
SERIES TOPIC
3F 1Copyright © 3P Learning
Geometry
Draw the other line to create an angle that is:
Wally the work experience boy made some mistakes labelling these angles. Correct any mistakes you see.
Label each of these angles as right, acute or obtuse:
Lines and angles – introducing angles
When an angle is less than a quarter turn of 90° we say it’s acute.When it’s exactly 90° we say it’s a right angle. When it’s between 90° and 180° we say it’s obtuse.When it’s exactly 180° we say it’s a straight angle.When it’s more than 180° we say it’s a refl ex angle.
We use an arc to show where we’re measuring.
With right angles, we use a square symbol like this .
90°
270°
180° 360°0°
1
a
angle
d
angle
b
angle
e
angle
c
angle
f
angle
a
angle
b
angle
c
angle
d
angle
2
3
obtuse straight refl ex acute
a
acute
b
right
c
obtuse
Remember to mark your angles with or !
acute
obtuse
right
acute
obtuse
acute
reflex acute obtuse
SERIES TOPIC
F 14Copyright © 3P Learning
Geometry
Use a protractor to measure all of these marked angles. Write the answers in the angles:
Some mes we need to be more precise when naming angles, instead of just using terms such as acute or obtuse. This is where a protractor comes in handy. To measure an angle using a protractor we:
fi t the baseline of the protractor to one line of the angle, lining up the centre point of the protractor with the vertex of the angle
look where the other line intersects the numbers, making sure we read round from 0°.
Lines and angles – measure and construct angles up to 90º using a protractor
baseline centre point
This is an angle of 50°
50°
0°
1
____°
____°
____°
____°
____°
____°
____°
____°
____°
___°
____° ____°
____°
____°
____°
____°
____°
____°
____°
225
80
100
120
120
120 120
105
70
75
90
90
90
90
115
130
120
120
100
80
SERIES TOPIC
5F 1Copyright © 3P Learning
Geometry
Lines and angles – measure and construct angles up to 90º using a protractor
Can you think of a way to measure the exterior angles of these 2 fi gures? Maybe a full (360°) protractor would help or is there another way to calculate that outside angle without actually measuring it? What else could you measure?
Use a protractor to complete these angles. One line is drawn for you. You need to measure and draw the other line. Draw it about the same length as the other line. Mark the angles with the measurements.
2
3
a
45°
d
110°
b
60°
e
10°
c
90°
______°
______°
Line the middle of your protractor up with the dot at the end of the line.
How many degrees in a full turn? How could this help me?
35°
When we talk about measuring angles we usually mean the interior angle. We can also measure the exterior angle – the one on the outside.
325
270
SERIES TOPIC
F 16Copyright © 3P Learning
Geometry
What to do next
What to do
If the minute hand moves 180°, how many degrees has the hour hand ‘passed’?
Use the clocks to calculate how many degrees have ‘passed’ between the minute hands:
a
b
c
Time passes investigate
Now consider the hour hands – how many degrees have ‘passed’ between the 2 hour hands?
a
b
________°
________°
________°
________°
________°
Ge ng ready In this ac vity you will measure the passing of me not
in minutes and hours, but in degrees.
You can work with a partner and you may like to use a clockface with movable hands to help you work out the answers.
How many degrees are there in an hour? How many degrees are there in 5 minutes?
60
120
180
60
330
15o
SERIES TOPIC
7FCopyright © 3P Learning
Geometry 2
Look at these polygons. Are they regular or irregular? Label them. You may use a ruler and a protractor to help you make your decision.
Use the rules and examples in the box above to decide if the following shapes are polygons. Circle the polygons:
2D shapes – distinguish among polygons, regular polygons and other two-dimensional shapes
A polygon is a 2D (fl at) shape with 3 or more straight sides. The word comes from the Greek words, poly and gonia, meaning many angles. All polygons are closed – they have no break in their boundaries. They have no curved sides.
These are polygons. These are not polygons.
1
2
Polygons can be regular or irregular.Regular polygons have all sides of equal length and all angles of equal size. Irregular polygons have sides of unequal length and angles of unequal size. Some mes we can think irregular shapes are not ‘proper’ as they look diff erent to the more common ones. These shapes are both hexagons because they both have six sides – but one is regular and one is irregular .
a _____________
b __________
c _____________
d __________
f _____________e __________
Do any of your answers surprise you? Why do you think this is?
regular
regular irregular
irregular
irregular
regular
SERIES TOPIC
F8Copyright © 3P Learning
Geometry2
What have you called the 4 sided shape? Compare your answer with those of 3 others. Do they agree with you? Why might there be diff erences?
Polygons are classifi ed and named diff erently depending upon their sides and angles. Label and draw at least one example of each of the following. Remember they don’t have to be regular. Research the names of any you don’t know:
a 3 angles and 3 sides _________________ b 4 angles and 4 sides _________________
c 5 angles and 5 sides _________________ d 6 angles and 6 sides _________________
e 7 angles and 7 sides _________________ f 8 angles and 8 sides _________________
g 9 angles and 9 sides _________________ h 10 angles and 10 sides ________________
i 11 angles and 11 sides _________________ j 12 angles and 12 sides ________________
4
3
triangle
2D shapes – distinguish among polygons, regular polygons and other two-dimensional shapes
quadrilateral
hexagonpentagon
octagonheptagon
decagonnonagon
dodecagonhendecagon
Answers will vary and may include:square, rectangle, quadrilateral, rhombus, kite and arrowhead.
SERIES TOPIC
9FCopyright © 3P Learning
Geometry 2
Use the informa on above and the dot paper below to create a square, a rectangle, a rhombus and a trapezoid. Check them against the criteria. Do they match? Swap with a partner and label each other’s shapes.
A quadrilateral is a kind of polygon. It’s a closed, fl at shape with 4 straight sides and 4 angles. The name comes from the La n, quad and latus, meaning 4 sides. One of the things that can be confusing about quadrilaterals is that there are a number of classifi ca ons, and shapes can be called diff erent names. This is how they all fi t together:
So a square is a kind of rhombus AND a rectangle AND a parallelogram AND a quadrilateral AND a polygon. It’s kind of like a Gardener’s Delight is a cherry tomato AND a tomato AND a fruit AND is considered a vegetable AND is a food.
2D shapes – quadrilaterals
quadrilateral4 sides and 4 angles
polygonclosed shape with straight sides
squareall angles are right angles
all sides are equal
trapezoid has 1 pair of parallel sides
parallelogramhas 2 pairs of parallel sides
irregularhas no parallel sides
kiterectangleall angles are right angles
opposite sides are equal and parallel
rhombusall sides are equal
opposite sides are parallelopposite angles are equal
arrowhead
1
square
trapezoid
rhombus
rectangle
SERIES TOPIC
F10Copyright © 3P Learning
Geometry2
2D shapes – quadrilaterals
Use the informa on below to draw the following quadrilaterals. Check your drawings with other students. Do they agree with you? Is it possible your drawings may be diff erent and s ll correct? Why?
As well as always having 4 sides, quadrilaterals have one other feature in common. Use a protractor to carefully measure the angles of these quadrilaterals. Add the 4 angles of each shape together. What do you fi nd?
a The angles of a quadrilateral always add to __________________________.
b Find 4 more quadrilaterals around the room and test out the theory.
a I have 4 sides of equal length.I have 4 equal angles. They’re all right angles.If you draw my diagonals, the lines form right angles where they intersect.
I’m a _________________________________
b Some mes I’m called an oblong.I have 4 sides.My opposite sides are equal.If you draw my diagonals, the angles opposite each other at the intersec on are equal.
I’m a _________________________________
3
2
c I have 2 pairs of equal sides.My opposite sides are equal in length.My opposite angles are equal.None of my angles are 90 .
I’m a _________________________________
d Some mes I’m known as a trapezium.I have one pair of opposite parallel lines.
I’m a _________________________________
360
square
rhombus
rectangle
trapezoid
SERIES TOPIC
11FCopyright © 3P Learning
Geometry 2
What do you no ce about the rela onship between the angles and the sides of a triangle? (This is always the case. They’re a consequence of each other.)
What do you no ce? Complete the following statements:
a Isosceles triangles have _________ equal angles.
b Equilateral triangles have _________ equal angles.
c Scalene triangles have _________ equal angles.
Now measure the lengths of the sides. Mark any lines that are the same length in a triangle with a li le line. The fi rst triangle has been marked for you in Ques on 1. What do you no ce? Complete the following statements:
a Isosceles triangles have _________ equal sides.
b Equilateral triangles have _________ equal sides.
c Scalene triangles have _________ equal sides.
Triangles are classifi ed into the 3 diff erent groups depending upon their angles. Below is an example of each group. Use a protractor to measure the angles of the triangles. Mark any angles that are the same in a triangle with an arc. The fi rst triangle has been done for you.
2D shapes – identify triangles
A triangle is a type of polygon. It has three sides and three angles. The three interior angles always add to 180°. Here are the 3 main types of triangles:
isosceles equilateral scalene
isosceles equilateral scalene
1
3
2
4
60
85
60 3560 60
2
2
3
3
0
0
The number of equal angles is the same as the number of equal sides.
SERIES TOPIC
F12Copyright © 3P Learning
Geometry2
Using a protractor to help you, draw an example of a right angled, equilateral, isosceles and scalene triangle below. Don’t label them or mark the angles or sides as equal. Switch papers with a partner and measure and label each other’s triangles. Switch back and check.
Measure the sides of both triangles to the nearest 12 cm and mark any equal sides.
a Based on your measurements, can right angled triangles be either isosceles or scalene? ____________
b Can they be equilateral? Why or why not?
____________________________________________________________________________________
____________________________________________________________________________________
There is another type of triangle you will come across. It’s called the right angled triangle. Look at these examples. How many degrees are the marked angles? What symbol tells you this?
2D shapes – identify triangles
6
5
Since same sides equal same angles, I just have to make sure the sides are equal! The angles will follow.
Yes
No. Because in an equilateral triangle, each angle is always 60 .
Answers will vary.
SERIES TOPIC
13FCopyright © 3P Learning
Geometry 2
2D shapes – circles
A circle is also a 2D shape. It’s a closed curve that has all of its points a fi xed distance from the centre. Later on, you will learn about the formal math of circles – they’re more complex than they look! Right now, it’s important to recognise the diff erent parts and to explore the rela onships between the parts.
centre – this is the point in the middle
radius – the distance from the centre to the circle’s edge
diameter – the distance from the edge of a circle through the middle to the opposite edge
circumference – the distance around the circle
arc – part of the circumference
sector – a ‘slice’ of the circle
Below are some circles. Each radius is marked.
a Extend the radius through the midpoint to the opposite edge of each circle. You have now marked the diameters.
b The diameter of each circle is twice its radius. Write the diameter of each circle in the boxes above.
1
diameter diameter diameter
2 cm1 cm
112 cm
4 cm 2 cm 3 cm
SERIES TOPIC
F14Copyright © 3P Learning
Geometry2
What to do next
What to do Read the ques ons below and choose the 10 ques ons you think will score you
the highest number of points. Once you’ve decided on your ques ons, ck them. They’re now locked in.
Once you and your partner have both fi nished, ask your teacher or the designated checker to check your answers. As Game Master, their decision is fi nal. Who won?
Circle sense apply
You’ll play this game with a partner. You’ll each need a copy of this page and it may pay to study the informa on on the previous page. The aim is to score the highest number of points you can by answering 10 ques ons. The harder ques ons score more points but of course, there is a greater risk of ge ng them wrong!
Play again choosing diff erent ques ons. You can reuse a ques on if you got it wrong but not if you answered it correctly the fi rst me. If you run out of ques ons, design some of your own.
What is the distance around a circle called? ................................................................... __________________
What is the name given to a small part of the distance around a circle? ....................... __________________
Name the distance from the centre of a circle to its edge. ............................................. __________________
What is the distance from the edge of a circle through the middle to the opposite edge called? ............................................................................................... __________________
What is the point in the middle of a circle called? .......................................................... __________________
What do we call a slice of a circle? ................................................................................. __________________
Name a 3D object that is circular. .................................................................................... __________________
FOR 5 POINTS
Is the radius of a circle twice its diameter? ..................................................................... __________________
Every part of a circle’s circumference is an equal distance from its centre. Is this statement correct? ................................................................................................ __________________
Name a 3D object that wouldn’t work if it wasn’t circular and explain why. ___________________________
Is a circle a polygon? Why or why not? ________________________________________________________
Another name for the circumference of a circle is its perimeter. Is this statement correct? .. __________________
A circle belongs to the quadrilateral family. Is this statement correct? .......................... __________________
If a circle has a diameter of 10 cm, what is its radius? .................................................... __________________
The circumference of a circle is twice its radius. Is this statement correct? ................... __________________
If a circle has a radius of 15 cm, what is its diameter? .................................................... __________________
FOR 10 POINTS
Ge ng ready
circumference
arc
radius
centre
diameter
sector
ball
No
Yes
Yes
No
5 cm
No
30 cm
No. A polygon has straight sides.
A ball wouldn’t roll.
SERIES TOPIC
15FCopyright © 3P Learning
Geometry 2
What to do Record your fi ndings in the table. Do you see any pa erns?
Shape Number of sides Number of triangles Sum of angles
square
pentagon
hexagon
octagon
decagon
dodecagon
How many triangles? investigate
Use the shapes below. Your task is to sec on each shape into triangles. Your lines must go from corner (vertex) to corner and can’t cross over each other.
Ge ng ready
How can I work out the sum of all the angles? Well, I know that all triangles have an angle sum of 180˚ so I can add how many triangles I have …
4
5
6
8
10
12
2
3
4
6
8
10
360
540
720
1 080
1 440
1 800
SERIES TOPIC
F16Copyright © 3P Learning
Geometry3
Transformation, tessellation and symmetry – symmetry
What do you no ce about lines of symmetry in regular polygons?
Find and mark any lines of symmetry on these regular polygons. These can be ver cal, horizontal or diagonal. If it’s easier, cut out copies of the shapes and fold them to test them.
a A square has _____ lines of symmetry. b An equilateral triangle has _____ lines of symmetry.
c An octagon has _____ lines of symmetry. d A hexagon has _____ lines of symmetry.
1
2
Refl ec ve or line symmetry describes mirror image, when one half of a shape or picture matches the other exactly. The middle line that divides the two halves is called the line of symmetry.Shapes may have: more than no line of symmetry one line of symmetry one line of symmetry
4 3
68
A regular polygon has the same number of lines of symmetry as it has sides.
SERIES TOPIC
17FCopyright © 3P Learning
Geometry 3
Compare your list with that of another group. Do they agree? If there are any le ers you disagree on, present your cases to each other and see if you can reach a consensus.
Transformation, tessellation and symmetry – symmetry
Look at these le ers of the alphabet. Work with a partner to decide which ones have lines of symmetry when wri en in this font. Which ones have more than one? Which ones have none? Record them in the table below:
3
4
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Ver cal line of symmetry
Horizontal line of symmetry
More than one line of symmetry
No lines of symmetry
A
H
I
M
O
T
U
V
W
X
Y
B
C
D
E
H
I
K
O
X
H
I
O
X
F
G
J
L
N
P
Q
R
S
Z
Answers will vary.
SERIES TOPIC
F18Copyright © 3P Learning
Geometry3
Colour the other half of these pictures so that they’re symmetrical:
Using the ver cal line as the line of symmetry, draw the mirror image in the top right square. Now refl ect the picture on the other side of the horizontal line of symmetry.
Transformation, tessellation and symmetry – symmetry
These shapes are called pentominoes. Some have lines of symmetry. Draw them in. The fi rst one has been done for you.
5
7
6
HINT: A small mirror on the line of symmetry will help.
We humans like symmetry.People considered to be beau ful usually have symmetrical faces.Top racehorses are very symmetrical too – this helps them run smoothly and fast!
SERIES TOPIC
19FCopyright © 3P Learning
Geometry 3
Transform these le ers:
Look at this trapezoid. Flip it in your head and then record what it looks like. Then turn it 180˚ clockwise (a half turn) in your head and record what it looks like now. Turn it another 90˚ clockwise (a quarter turn) and record.
What has been done to this le? Describe each transforma on as either a fl ip, slide or turn:
Transformation, tessellation and symmetry – transformation
When we move a shape, we transform it. This le shows three ways we can do this:
When we’re asked to fl ip, slide or turn, it helps to visualise the move in our heads.
refl ect(fl ip)
translate(slide)
rotate(turn)
1
3
2
a
turn 90° clockwise
d
fl ip
b
fl ip
e
fl ip
c
slide
f
turn 180°
T
N
H
Q
J
W
slide slideturn turnflip flip
H
Q
T
N
J
W
SERIES TOPIC
F20Copyright © 3P Learning
Geometry3
Rotate each shape and record the new posi on. Star ng from the original posi on each me, rotate each shape by a quarter turn, half turn, three quarter and full turn and record each new posi on.
a
b
c
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These are common rota ons:
original quarter turn half turn three quarter turn full turn posi on 90˚ 180˚ 270˚ 360˚
What do you no ce about a full turn?
Transformation, tessellation and symmetry – transformation
4
5
Think of the name of a capital city somewhere in the world. Disguise its name by choosing to either fl ip, slide or turn each capital le er. Ask a partner to decode it. For example, PARIS could be disguised as .
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Answers will vary.
SERIES TOPIC
21FCopyright © 3P Learning
Geometry 3
Use pa ern blocks to fi nd shape pairs that tessellate. Record them here. How many can you fi nd? Here’s one to get you started:
b Which of the 3 regular polygons tessellated without fl ipping or turning? __________________________
c Which regular polygons do you need to fl ip or turn to get them to tessellate?
____________________________________________________________________________________
We bet you’ve been tessella ng with pa ern blocks since you were a li le kid. Now we want you to work out which shapes tessellate and which don’t.
a Work with a partner and use pa ern blocks to fi nd 3 regular polygons that tessellate on their own. Remember, a regular polygon has sides of equal length. Record your proof below:
Tessella on comes from the Greek word, tessere, which means square tablet. It means covering a surface with a pa ern of 2D shapes with no gaps or spaces. When we tessellate a shape, we o en fl ip or turn the shapes so that they fi t together.Some shapes will tessellate on their own. We call this regular tessella on.Some shapes tessellate when you use 2 shapes in the pa ern. We call this semi-regular tessella on. Tessella on is closely linked with art. Mosaics, patchwork and paving use tessella on. Can you think of others?
Transformation, tessellation and symmetry – tessellation
1
2
square
triangle and hexagon
hexagons and triangles
squares and triangles
octagons and triangles
octagons and squares
SERIES TOPIC
F22Copyright © 3P Learning
Geometry3
Tessella ons usually involve crea ng a pa ern and repea ng it over and over. A famous mathema cian named Roger Penrose was obsessed with fi nding a tessella on that was created without repea ng any large pa erns. It took him a while but he got there. It’s o en called “Kites and Darts” as the two parallelograms in the pa ern resemble these.Colour the pa ern in colours of your choice on the right to recreate his discovery. While you’re doing that, check – can you see any large repeated pa erns?
Transformation, tessellation and symmetry – tessellation
It’s said that all quadrilaterals tessellate. Is this true? Work with a partner to test this theory out. Use blocks or tessella on shapes such as those below. Record your fi ndings below then ck the ones that tessellate once you know:
3
5
4 Do you agree with the statement that all quadrilaterals tessellate? Why or why not?
Answers will vary.
Yes– all will tessellate.
SERIES TOPIC
23FCopyright © 3P Learning
Geometry 3
What to do Recreate one of the designs below by ruling over certain lines. Pick a colour scheme
and complete your design.
Tessellate and create create
Many cultures and art styles use tessella ons as a basis for crea ng intricate and beau ful pa erns. Islamic art is one such art form. Look at the examples below.
Ge ng ready
SERIES TOPIC
F24Copyright © 3P Learning
Geometry3
What to do
Dig it, Dr Jones create
You have 14 of the plate. You need to fi nd a way to recreate the rest of it. How will
you do this? Would a compass help? How will you fi nd the right centre point?
Then, use your knowledge of symmetry and tessella on to complete the design.
While working on an archaeological dig with the famous Dr Jones, you come across a por on of a beau ful old plate.
Dr Jones thinks it may be 14 of the Lost Plate of Icarus, a priceless fi nd. He asks you
to recreate what you think the en re plate may have looked like.
Ge ng ready
SERIES TOPIC
25FCopyright © 3P Learning
Geometry 4
2D shapes have 2 dimensions – width and height. They’re fl at.
3D shapes have 3 dimensions – height, width and depth. Some mes we call them solids. When we draw them, we o en show them as transparent or as skeletons so we can ‘see’ all their sides.3D shapes can have all fl at sides, all curved sides, or a mixture of both.
Look at these 3D shapes. Which 2D shapes form their sides? If it helps, fi nd the solids in your classroom and study them.
Have these ques ons been answered correctly? Correct any mistakes:
a How many surfaces does this shape have?
b How many ver ces?
c How many edges?
Study the shape and answer the following:
a How many surfaces does this shape have?
b How many ver ces?
c How many edges?
3D shapes – introduction
a This is made of:
____ squares
b This is made of:
2 ______________
4 ______________
c This is made of:
1 ______________
____ ___________
d This is made of:
____ ___________
____ triangles
height
height
width
width
depth
1
3
2
The 2D shapes are the surfaces of a 3D shape. The edge is where 2 surfaces meet. The point where 2 or more surfaces meet is called the vertex. If we’re talking about more than one vertex, we call them ver ces.
6
12
8
squares6 1
54
rectangle
rectangles triangles
pentagon
4
4
6
8
12
SERIES TOPIC
F26Copyright © 3P Learning
Geometry4
Use classroom equipment such as geo shapes, polydrons or straws and plas cine to create 2 diff erent prisms. Name them here and record how many ver ces, edges and surfaces they have.
Count the number of sides on each grey face. Now count the number of rectangular faces each shape has. What do you no ce?
Finish these prisms by ruling the missing edges. Name them according to their faces. The fi rst one has been done for you.
3D shapes – polyhedrons
Some 3D shapes are polyhedrons. This means each surface is a polygon. The polyhedrons we most commonly come across are pyramids and prisms.
Prisms have iden cal parallel faces joined by rectangles. Boxes are a good example of prisms – have a look in your kitchen cupboard at home at the cereal and pasta boxes.Most prisms are named a er their end faces (e.g. rectangular prism, triangular prism).
a ________________ prism
b ________________ prism
c ________________ prism
d ________________ prism
1
2
3
cube or square
3D shapes
polyhedrons
pyramids otherprisms
rectangular triangular pentagonal
They’re the same.
Answers will vary.
SERIES TOPIC
27FCopyright © 3P Learning
Geometry 4
What kind of pyramids are these? Remember a pyramid is named a er its base.
Pyramids have a base with 3 or more straight sides. They have triangular faces which meet at a point. They’re named a er their bases.
What do you no ce about the number of sides on the base and the number of triangular faces?
Pretend you’ve cut apart a hexagonal pyramid. Draw all its faces. What shape will the base be?How many triangular sides will you draw?
3D shapes – polyhedrons
a ________________ pyramid b ________________ pyramid c ________________ pyramid
4
5
6
7 What are 3 things pyramids and prisms have in common? What is something that makes them diff erent?
hexagonal triangular rectangular
They’re the same.
Answers will vary and may include:
– Pyramids and prisms are made up of polygons/flat sides.
– Pyramids and prisms have angles, vertices and edges.
– Pyramids and prisms have straight edges.
– Pyramids have 1 point at the top, prisms don’t.
– The sides of a pyramid are triangular, prisms have rectangular sides.
Hexagon base
6 triangular faces
SERIES TOPIC
F28Copyright © 3P Learning
Geometry4
Many polyhedrons are named according to the number of faces they have. Colour match the informa on with the shape and the name. You may need to do some research! The fi rst one has been done for you.
3D shapes – polyhedrons
There are other kinds of polyhedrons. They’re also made up of polygons and have straight sides, but they don’t fi t the rules for pyramids and prisms. Here are some examples:
Change these shapes so they’re s ll polyhedrons but no longer regular prisms or pyramids. Maybe you could draw in a do ed line to show a cut or add some extra faces.
Create a polyhedron out of polydrons or geoshapes. Count how many faces it has. Can you fi nd out what it should be called?
8
9
10
3D shapes don’t have to be regular. They can be made up of diff erent shapes and have angles and sides of diff erent sizes.
This is s ll a polyhedron: This is s ll a pentagonal prism:
octahedron
tetrahedron
4 faces, 6 edges, 4 ver ces
dodecahedron
icosahedron
8 faces, 12 edges, 6 ver ces
12 faces, 30 edges, 20 ver ces
cube or hexahedron
6 faces, 12 edges, 8 ver ces
20 faces, 30 edges, 12 ver ces
*¤
¤
¤
◊
◊
◊
#
##
**
Answers will vary.
Possible answer: Answers
will vary.
SERIES TOPIC
29FCopyright © 3P Learning
Geometry 4
3D shapes – spheres, cones and cylinders
Another group of 3D shapes has one or more curved surfaces. Examples include spheres, cones and cylinders.
What am I? Use the clues to decide which shape I am:
a I have 1 curved surface. That’s it, I like to keep things simple. _____________________________
b When you cut a cross sec on from me, both parts keepthe same number of edges and surfaces. _____________________________
c I have no ver ces and 3 surfaces. _____________________________
d I have 1 edge and 2 surfaces. _____________________________
Pretend you have to describe these shapes to someone who can’t see or feel them. Make sure you talk about their surfaces, their ver ces and their edges and anything else you think would help them build a picture.
1
2
3
When we cut through a solid parallel to the base, we make a cross sec on.
a Draw how these shapes would look like in 2 pieces:
b How has this changed the sphere? Explain this in terms of surfaces, edges and ver ces.
a b c
Answers will vary.
It now has 2 surfaces. One is flat. It has one edge and no vertices.
sphere
cube or retangular prism
cylinder
cone
SERIES TOPIC
F30Copyright © 3P Learning
Geometry4
Draw do ed lines to reveal missing edges, surfaces or ver ces:
Draw some 3D shapes:
Use a ruler to join the bases of these pyramids with their points:
When we draw 3D shapes, we can draw do ed lines to show the surfaces, edges and ver ces we can’t see.
3D shapes – drawing 3D shapes
1
2
3
a
d
b
e
c
f
a b c d
If you draw lightly with a sharp pencil, you can rub mistakes out easily!
Answers will vary.
SERIES TOPIC
31FCopyright © 3P Learning
Geometry 4
Copy these irregular 3D shapes:
Use the dot paper to help you fi nish these shapes. We have helped you with the fi rst one.
We can use dot paper or hexagonal grids to guide us when we draw 3D shapes.
3D shapes – drawing 3D shapes
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a
c
e
b
d
f
a b c dcube rectangularprism
triangularprism
pentagonalprism
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a
c
e
b
d
f
SERIES TOPIC
F32Copyright © 3P Learning
Geometry4
Create a net for a cube. Cut it out and test it. Does it work?
Fold these nets in your head, join them to their shapes with a line and name them:
A net is the pa ern of a 3D shape, unfolded and laid fl at. You may have already assembled a few during your schooling! It also helps if you can fold and unfold them in your head.
3D shapes – nets
2
1
_________________________
_________________________
_________________________
_________________________
copy
square pyramid
pentagonal pyramid
hexagonal prism
triangular prism
Answers will vary.
SERIES TOPIC
33FCopyright © 3P Learning
Geometry 4
What to do Colour match the correct parts. Your teacher has a list of the shapes if it would help
to know which shapes you’re looking for.
2 halves make a whole … apply
The nets of 5 solids are below – the problem is that they’ve been separated into two parts. Your job is to match the parts correctly. See if you can do it in your head. If this proves too diffi cult, you can cut the nets out and physically join them to form the solid.
Ge ng ready
¤
¤
◊
◊
∆
∆
#
#
*
*
List of shapes:pentagonal prism,
cube, hexagonal pyramid, triangular pyramid,
triangular prism
SERIES TOPIC
F34Copyright © 3P Learning
Geometry4
What to do next
What to do
Tomb Raider investigate
You’re trapped in a tomb far underground. There are 6 key zones in the tomb.
Present your fi ndings to the Guardian of Power (that would be your teacher). If they’re correct, you may escape scot free. If not? Well, only they know what punishment is in store. There are 28 routes in total. For an extra challenge, you could try and fi nd them all.
To escape, you must fi nd 10 diff erent ways to get from the ledge to the gold.
Record them below. We have given you one route to get you started: ledge coffi n gold.
Ge ng ready
Answers will vary.
35Series F Topic 1 AssessmentCopyright © 3P Learning
a
55°
b
90°
c
110°
Lines and angles Name ____________________
Draw:
2
3
1
Draw an angle that is:
Label each of these angles as right, acute, refl ex or obtuse:
a
angle
b
angle
c
angle
d
angle
Skills Not yet Kind of Got it
• Knows terms parallel, perpendicular, horizontal, ver cal
• Recognises and labels acute, obtuse, right angled and refl ex angles
• Draws angles to 5 markers
a 2 parallel lines b 2 lines perpendicular to each other
c a horizontal line d a ver cal line
36 Series F Topic 1 Assessment Copyright © 3P Learning
a
55°
b
90°
c
110°
Lines and angles Name ____________________
Draw:
2
3
1
Draw an angle that is:
Label each of these angles as right, acute, refl ex or obtuse:
a
angle
b
angle
c
angle
d
angle
Skills Not yet Kind of Got it
• Knows terms parallel, perpendicular, horizontal, ver cal
• Recognises and labels acute, obtuse, right angled and refl ex angles
• Draws angles to 5 markers
a 2 parallel lines b 2 lines perpendicular to each other
c a horizontal line d a ver cal line
reflex right obtuse acute
37Series F Topic 2 AssessmentCopyright © 3P Learning
a b c d
2D shapes Name ____________________
Draw a line from the label to the correct triangle:
Look at the following two quadrilaterals. Name them and list their proper es:
Circle the polygons:
2
3
4
1
Name these polygons:
equilateral triangleright angled triangleisosceles triangle scalene triangle
38 Series F Topic 2 Assessment Copyright © 3P Learning
Label the following parts of the circles below:
a b
c d
Name and draw this mystery shape:I have 4 sides. All of my angles are equal. If you draw in my diagonals, the lines form right angles where they intersect.
If I drew a shape and the sum of the angles was 180˚, what shape could I have drawn? Draw it.
2D shapes Name ____________________
5
6
7
Skills Not yet Kind of Got it
• Recognises and names simple polygons
• Names proper es of simple quadrilaterals
• Recognises and names diff erent types of triangles
• Names diff erent parts of circles
• Uses knowledge of shape proper es to iden fy simple polygons
39Series F Topic 2 AssessmentCopyright © 3P Learning
a b c d
2D shapes Name ____________________
Draw a line from the label to the correct triangle:
Look at the following two quadrilaterals. Name them and list their proper es:
Circle the polygons:
2
3
4
1
Name these polygons:
equilateral triangleright angled triangleisosceles triangle scalene triangle
hexagon rectangle pentagon octagon
trapezoid
4 straight sides.
1 pair parallel sides.
2 acute angles (equal).
2 obtuse angles (equal).
square
4 straight equal sides.
2 sets of parallel sides and all angles are right angles.
40 Series F Topic 2 Assessment Copyright © 3P Learning
Name and draw this mystery shape:I have 4 sides. All of my angles are equal. If you draw in my diagonals, the lines form right angles where they intersect.
If I drew a shape and the sum of the angles was 180˚, what shape could I have drawn? Draw it.
2D shapes Name ____________________
5
6
7
Skills Not yet Kind of Got it
• Recognises and names simple polygons
• Names proper es of simple quadrilaterals
• Recognises and names diff erent types of triangles
• Names diff erent parts of circles
• Uses knowledge of shape proper es to iden fy simple polygons
Label the following parts of the circles below:
a b
c d
radius diameter
arc circumference
triangle
square
41Series F Topic 3 AssessmentCopyright © 3P Learning
Transformation, tessellation and symmetry Name ____________________
Rotate this shape and record the new posi on. Do a quarter turn, half turn, three quarter and full turn.
Transform these le ers:
Complete this picture so it’s symmetrical:
Draw the lines of symmetry on these shapes:
2
3
4
1
a b c
a
turn 180°
d
fl ip
b
turn 90°
e
fl ip
c
slide
f
turn 180°
T
N
M
Q
L
Y
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� �
� �
� �
� �
� �
� �
� �
42 Series F Topic 3 Assessment Copyright © 3P Learning
Which of these shapes tessellate on their own? Remember you can fl ip or turn them. Use the dot paper to help work this out. Colour any shapes that will tessellate and cross out the shapes that won’t.
Con nue this tessella on across the page:
Transformation, tessellation and symmetry Name ____________________
What is tessella on? Pretend you’re explaining it to a younger student. What would you say and/or draw?
6
7
5
Skills Not yet Kind of Got it
• Iden fi es and draws lines of symmetry
• Visualises and represents transforma ons – fl ips, slides, turns
• Understands and describes tessella on
• Con nues simple tessella ons
• Makes judgments about which simple polygons will tessellate
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
43Series F Topic 3 AssessmentCopyright © 3P Learning
Transformation, tessellation and symmetry Name ____________________
Rotate this shape and record the new posi on. Do a quarter turn, half turn, three quarter and full turn.
Transform these le ers:
Complete this picture so it’s symmetrical:
Draw the lines of symmetry on these shapes:
2
3
4
1
a b c
a
turn 180°
d
fl ip
b
turn 90°
e
fl ip
c
slide
f
turn 180°
T
N
M
Q
L
Y
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� �
� �
� �
� �
� �
� �
� �
Q
T
YM
L
N
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � �
� �
� �
� �
� �
� �
� �
� �
44 Series F Topic 3 Assessment Copyright © 3P Learning
Which of these shapes tessellate on their own? Remember you can fl ip or turn them. Use the dot paper to help work this out. Colour any shapes that will tessellate and cross out the shapes that won’t.
Con nue this tessella on across the page:
Transformation, tessellation and symmetry Name ____________________
What is tessella on? Pretend you’re explaining it to a younger student. What would you say and/or draw?
6
7
5
Skills Not yet Kind of Got it
• Iden fi es and draws lines of symmetry
• Visualises and represents transforma ons – fl ips, slides, turns
• Understands and describes tessella on
• Con nues simple tessella ons
• Makes judgments about which simple polygons will tessellate
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
Answers will vary.
Answers will vary and may include:
45Series F Topic 4 AssessmentCopyright © 3P Learning
3D shapes Name ____________________
Draw a line of cross sec on across this shape and then draw what the two pieces would look like if the shape was cut:
Label each of these 3D shapes:
Name this shape and list the proper es. Make sure you iden fy how many edges, faces and ver ces it has:
How are prisms and pyramids similar? How are they diff erent? Explain using words and/or diagrams:
Name these 3D shapes:
2
3
5
4
1
a b c d
a b c
46 Series F Topic 4 Assessment Copyright © 3P Learning
Draw in do ed lines to reveal the missing edges, sides and ver ces of these shapes:
Complete these 3D shape drawings:
Draw lines to match the nets to the correct shape names:
3D shapes Name ____________________
What is a net? Explain it using words. (We mean the mathema cal kind, not the catching bu erfl ies kind.)
7
8
9
6
triangular prism triangular pyramid pentagonal prism
a b c
a b � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � �
� � � � � �
� � � � � � �
� � � � � �
� � � � � � �
� � � � � �
� � � � � � �
� � � � � �
� � � � � � �
� � � � � �
� � � � � � �
� � � � � �
� � � � � � �
� � � � � �
Skills Not yet Kind of Got it
• Iden fi es and names simple polyhedrons
• Iden fi es proper es of a square based pyramid, including faces,edges and ver ces
• Describes similari es and diff erences between pyramids and prisms
• Visualises and represents cross sec ons of polygons
• Visualises and describes nets
• Sketches 3D models
47Series F Topic 4 AssessmentCopyright © 3P Learning
3D shapes Name ____________________
Draw a line of cross sec on across this shape and then draw what the two pieces would look like if the shape was cut:
Label each of these 3D shapes:
Name this shape and list the proper es. Make sure you iden fy how many edges, faces and ver ces it has:
How are prisms and pyramids similar? How are they diff erent? Explain using words and/or diagrams:
Name these 3D shapes:
2
3
5
4
1
a b c d
a b c
hexagonal pyramid
cube or hexahedron
Square based pyramid
– 1 square base
– 4 triangular faces
– 5 vertices
– 8 edges
– 5 faces
Answers will vary and may include:
Similiarities:
– straight edges
– 3D shapes
Differences:
– pyramids come to 1 point at the top
– prisms have 2 matching ends
– the faces of a pyramid are triangles, the faces of a prism are rectangles
triangular pyramid
rectangular prism
sphere cone cylinder
48 Series F Topic 4 Assessment Copyright © 3P Learning
Draw in do ed lines to reveal the missing edges, sides and ver ces of these shapes:
Complete these 3D shape drawings:
Draw lines to match the nets to the correct shape names:
3D shapes Name ____________________
What is a net? Explain it using words. (We mean the mathema cal kind, not the catching bu erfl ies kind.)
7
8
9
6
triangular prism triangular pyramid pentagonal prism
a b c
a b � � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
� � � � � � �
� � � � � �
� � � � � � �
� � � � � �
� � � � � � �
� � � � � �
� � � � � � �
� � � � � �
� � � � � � �
� � � � � �
� � � � � � �
� � � � � �
� � � � � �
Skills Not yet Kind of Got it
• Iden fi es and names simple polyhedrons
• Iden fi es proper es of a square based pyramid, including faces,edges and ver ces
• Describes similari es and diff erences between pyramids and prisms
• Visualises and represents cross sec ons of polygons
• Visualises and describes nets
• Sketches 3D models
Answers will vary.
� � � � � � � � � � � � � � �
� � � � � � � � � � � � � � �
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� � � � � � � � � � � � � � �
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� � � � � �
� � � � � � �
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