angles and shapes
TRANSCRIPT
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FUN WITH ANGLES AND POLYGONS
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INTRODUCTION TO GEOMETRY
Unit 1: Angles Unit 2: Triangles Unit 3: Quadrilaterals
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UNIT ONE: EXPLORING ANGLES
Can you name the following angles?
Click on the angle to reveal its name.
obtuse acute
right straight
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ANGLE INFORMATION
Acute Angles – measure less than 90º
Right Angles – measure exactly 90º
Obtuse Angles – measure more than 90º but less than 180º
Straight Angles – measure exactly 180º
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Can you think of a way to remember the names for each angle?
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UNIT ONE: ANGLES QUICK CHECK
Question #1An acute angle is greater than 90º.
A. TrueB. False
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UNIT ONE: ANGLES
OOPS!!!!!
Remember an acute angle is a cute little angle.
Try Again
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UNIT ONE: ANGLES
Congratulations!!!!!
An acute angle is less than 90º.
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UNIT ONE: ANGLES QUICK CHECK
Question #2An obtuse angle is greater than90º but less than 180º.
A. TrueB. False
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UNIT ONE: ANGLES QUICK CHECK
OOPS!!!!!
Better check again. Obtuse angles are almost right and not quite straight.
Try Again
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UNIT ONE: ANGLES QUICK CHECK
Congratulations!!!!
An obtuse angle is between 90ºand 180º.
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UNIT ONE: ANGLES QUICK CHECK
Question # 3A straight angle measures 180º.
A. TrueB. False
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UNIT ONE: ANGLES QUICK CHECK
OOPS!!!!!
Remember. A straight angle looks like a straight line.
Try Again
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UNIT ONE: ANGLES QUICK CHECK
Congratulations!!!!
A straight angle measures 180º and looks like a straight line.
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UNIT ONE: ANGLES QUICK CHECK
Question #4A right angle does not
measure90º.
A. TrueB. False
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UNIT ONE: ANGLES QUICK CHECK
OOPS!!!!!
A right angle looks like the corner of a piece of paper.
Try Again
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UNIT ONE: ANGLES QUICK CHECK
Congratulations!!!!
A right angle does measure exactly 90º.
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UNIT TWO : TRIANGLES
Can you identify theses triangles by their angles?
Right acute obtuse
Click on the angle to check your answer.
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UNIT TWO: TRIANGLES
Right Triangles - have exactly one right angle.
Acute Triangles – all angles are less than 90º.
Obtuse Triangles - have exactly one angle greater than 90º.
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UNIT TWO: TRIANGLES
Can you identify these triangles by their sides?
isosceles scalene equilateral
Click on the triangle to check your answer.
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UNIT TWO: TRIANGLES
Isosceles Triangles - two sides are of equal length
Scalene Triangles - no sides are equal in length
Equilateral Triangles - all sides are of equal length
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TRIANGLES TASK
For this task, you and your partner, must complete the activity on the webpage listed below. Review the triangles and then click Triangles Quiz. Write your answers on a sheet of paper.
Triangles Review
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UNIT THREE: QUADRILATERALS
Can you identify the following quadrilaterals?
parallelogram rectangle
square
rhombus trapezoid
Click on the quadrilateral to check your answer.
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UNIT THREE: QUADRILATERALS
Parallelograms - 4-sided figure, opposite sides are parallel and congruent
Rectangle – 4 sided figure with 4 right angles and opposite side congruent
Square – 4 sided figure with 4 right angles and 4 congruent sides
Rhombus – 4 sided figure, all sides are congruent Trapezoid – 4 sided figure with one pair of parallel
lines
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UNIT THREE: QUADRILATERALS QUICK CHECK
Question #1A rectangle is a four sided figure with 4congruent sides.
A. TrueB. False
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UNIT THREE: QUADRILATERALS
OOPS!!!!!!!!
Think about it. A rectangle looks like a long box.
Try Again
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UNIT THREE: QUADRILATERALS
Great!!!!!!!!!
You remembered that a rectanglehas 2 parallel sides, 4 rightangles, and opposite sides arecongruent.
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UNIT THREE: QUADRILATERALS QUICK CHECK
Question #2A rhombus has four congruent sides.
A. TrueB. False
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UNIT THREE: QUADRILATERALS
OOPS!!!!!!!!
Remember that a rhombus looks like a kite or a diamond.
Try Again
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UNIT THREE: QUADRILATERALS
HOORAY!!!!!!
You remembered that a rhombuslooks like an italic square and all 4sides are congruent.
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UNIT THREE: QUADRILATERALS QUICK CHECK
Question #3A square is a quadrilateral with only two rightangles.
A. TrueB. False
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UNIT THREE: QUADRILATERALS
OOPS!!!!!!!!!
A square has all sides congruent and all angles congruent.
Try Again
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UNIT THREE: QUADRILATERALS
Nice Job!!!!!!!
You knew that a square has fourequal sides and four equal angles.
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UNIT THREE: QUADRILATERALS QUICK CHECK
Question #4A trapezoid is a four sided figure with one setof parallel sides.
A. TrueB. False
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UNIT THREE: QUADRILATERALS
OOPS!!!!!!
Think of the tables in a classroom. It looks like a triangle without the top.
Try Again
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UNIT THREE: QUADRILATERALS
AWESOME!!!!!!!
A trapezoid has exactly one set ofparallel sides.
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UNIT THREE: QUADRILATERALS QUICK CHECK
Question #5A parallelogram has two sides that areparallel and opposite angles are congruent.
A. TrueB. False
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UNIT THREE: QUADRILATERALS
OOPS!!!!!!
Remember that a parallelogram looks like an italic rectangle.
Try Again
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UNIT THREE: QUADRILATERALS
Nice Work!!!!!
A parallelogram is a 4 sided figurewith opposite sides parallel andopposite angles congruent.