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Area is the amount of surface
space that a flat 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.
Lets find the area of this surface if each
square is equal to one foot.
Count the number of squares.


          1     2
                           Area = 15 square feet
          3

4    5    6    7     8

9   10    11   12   13    14

               15
Try this one!         Count the
                      number of
                        green
                      squares to
                      determine
 1         2    3    the area of
                    this surface.
                     What is the
 4         5    6       area?



 7         8    9    The area is
                      equal to 9
                    square units.
Perimeter is the distance around the
outside edge of a flat object.

    Perimeter is reported as a total
    number of linear units.
When you measure the
amount of wallpaper border
to go around a room, you
measure it in lengths.

        Would the perimeter of
        your bedroom or the
        perimeter of your house
        be greater?

                 You’re right! The perimeter
                 of your house is greater
                 than the perimeter of your
                 bedroom.
Let’s find the perimeter of this surface if each
square is equal to one foot.
Count the number of sides.




                             Perimeter = 24 feet
Try this one!
                  Count the
                  number of
                   sides to
                determine the
                 perimeter of
                   this flat
                    object.


                    The
                perimeter is
                equal to 12.
Let’s do these problems together.

Two neighbors build swimming pools.
This is what the pools look like.
Which family has the pool with the
bigger swimming area?

     Family A
                             Family B
The area of Family A’s pool is?    8 square units.
The area of Family B’s pool is?    7 square units

     Therefore, Family A has the pool with
      the bigger swimming area.



  Family A
                                  Family B
Now look at those same two pools. Which family
has more side panels of the pool to clean?
The perimeter of Family A’s pool is 12 units long.
The perimeter of Family B’s pool is 14 units long.

Therefore, Family B has more side
panels of the pool to clean.


      Family A
                                         Family B
Area and perimeter

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Area and perimeter

  • 1.
  • 2. Area is the amount of surface space that a flat object has. Area is reported in the amount of square units.
  • 3. 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.
  • 4. Lets find the area of this surface if each square is equal to one foot. Count the number of squares. 1 2 Area = 15 square feet 3 4 5 6 7 8 9 10 11 12 13 14 15
  • 5. Try this one! Count the number of green squares to determine 1 2 3 the area of this surface. What is the 4 5 6 area? 7 8 9 The area is equal to 9 square units.
  • 6. Perimeter is the distance around the outside edge of a flat object. Perimeter is reported as a total number of linear units.
  • 7. When you measure the amount of wallpaper border to go around a room, you measure it in lengths. Would the perimeter of your bedroom or the perimeter of your house be greater? You’re right! The perimeter of your house is greater than the perimeter of your bedroom.
  • 8. Let’s find the perimeter of this surface if each square is equal to one foot. Count the number of sides. Perimeter = 24 feet
  • 9. Try this one! Count the number of sides to determine the perimeter of this flat object. The perimeter is equal to 12.
  • 10. Let’s do these problems together. Two neighbors build swimming pools. This is what the pools look like. Which family has the pool with the bigger swimming area? Family A Family B
  • 11. The area of Family A’s pool is? 8 square units. The area of Family B’s pool is? 7 square units Therefore, Family A has the pool with the bigger swimming area. Family A Family B
  • 12. Now look at those same two pools. Which family has more side panels of the pool to clean? The perimeter of Family A’s pool is 12 units long. The perimeter of Family B’s pool is 14 units long. Therefore, Family B has more side panels of the pool to clean. Family A Family B