Area and Perimeter Review

Front

What is area?

Back

Area is the amount of space inside a shape, measured in square units.

Front

What is perimeter?

Back

Perimeter is the distance around a shape, calculated by adding the lengths of all its sides.

Front

How do you calculate the area of a rectangle?

Back

Area = length × width.

Front

How do you calculate the perimeter of a rectangle?

Back

Perimeter = 2 × (length + width).

Front

If the area of a rectangle is 40 square meters and the width is 4 meters, what is the length?

Back

Length = Area ÷ Width = 40 ÷ 4 = 10 meters.

Front

If the area of a rectangle is 63 square millimeters and the length is 9 millimeters, what is the width?

Back

Width = Area ÷ Length = 63 ÷ 9 = 7 millimeters.

Front

What is the perimeter of a rectangle with a length of 10 meters and a width of 2 meters?

Back

Perimeter = 2 × (10 + 2) = 24 meters.

Front

What is the perimeter of a rectangle with a length of 7 km and a width of 3 km?

Back

Perimeter = 2 × (7 + 3) = 20 km.

Front

If the perimeter of a rectangle is 60 units and one side is 20 units, what is the length of the other side?

Back

Other side = (Perimeter ÷ 2) - one side = (60 ÷ 2) - 20 = 10 units.

Front

What units are used to measure area?

Back

Area is measured in square units, such as square meters (m²) or square centimeters (cm²).