4th grade area and perimeter introduction
DESCRIPTION
An introduction to the ceoncepts of area and perimeter. This interactive PowerPoint engages students as they explore how are and perimeter are a part of our every day lives!TRANSCRIPT
Created by: Erica Danielle MitchellEDLD 590 Dr. Landor
-Area is the amount of
surface space that an object
has.
-Area is reported in the amount
of square units.
When you measure the amount of carpet to cover the floor of a room, you measure it in square units.
Would the area of your bedroom or the area of your house be greater?
You’re right! The area of your house is
GREATER than the area of your bedroom.
Area = ? square feet
Lets find the area of this surface. Each square is equal to
one foot.
How would you do this? LET’S SHARE!!!1 2
3
4 5 6 7 8
9 10 11 12 13 14
15
15 square feet
Count the
number of
green
squares to
determine
the area of
this
surface.
What is the
area?
The area is equal to ? square units.
Try this Try this
one!one!1
5
2
4
7
3
6
8 9
Perimeter is the distance around the outside of an object.
Perimeter is reported as a total number of linear units.
When you measure the
amount of fence
needed to go around
a yard, you measure
it in length.
Would the perimeter of a football field or a small garden be greater?
You’re right! The
perimeter of a football
field is greater than the
perimeter of a small
garden.
Perimeter = 24 feet
Let’s find the perimeter of this surface. Each square is equal to one foot.
Count the number of sides.
Count the
number of
sides to
determine
the
perimeter of
this flat
object.The perimeter
is equal to ?.
12 units
Two neighbors build swimming pools. This is what the pools look like.
Family A Family B
Which family has
the pool with the
bigger swimming
area?
Let’s do these problems together.
The area of Family A’s pool is?
Family A
Family B
? square units.
? square unitsThe area of Family B’s pool is?
Therefore, Family ___ has the pool with the bigger swimming area.
The perimeter of Family A’s pool is 12 units long.
Family B
Family A
The perimeter of Family B’s pool is 14 units long.Therefore, Family B has more side panels of the pool to clean.
Now look at those same two pools. Which family has more side panels of the pool to clean?
