Area and Perimeter Dr. Beth McCulloch Vinson Athens State University PT3 Grant Funding, Summer 2000

Area 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.

Count the number of green squares to determine the area of that surface. The area is equal to 9 squares.

Perimeter 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.

The perimeter is equal to 12. Count the number of sides to determine the perimeter of this flat object. The perimeter is equal to 12.

What is 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 8 7 10 11 12 9 13 14 15

What is the perimeter of this surface if each square is equal to one foot? Count the number of sides. Perimeter = 24 feet

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

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 B Family A

Now look at those same two pools Now look at those same two pools. Which family has more side panels of the pool to clean? Family B Family A

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 B Family A

Preparing Tomorrow’s Teachers to Use Technology (PT3) The End A Project Developed for Preparing Tomorrow’s Teachers to Use Technology (PT3) By Dr. Beth McCulloch Vinson Athens State University, College of Education http://www.athens.edu/vinsobm