area and perimeter

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 total 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 a rectangle has an area of 36 and the width is 4, what is the length?

Back

Length = Area ÷ Width = 36 ÷ 4 = 9.

Front

If the perimeter of a rectangle is 42 and the length is 6, what is the width?

Back

Width = (Perimeter ÷ 2) - Length = (42 ÷ 2) - 6 = 15.

Front

What is the perimeter of a rectangle with length 10 and width 5?

Back

Perimeter = 2 × (10 + 5) = 30.

Front

What is the area of a rectangle with length 8 and width 3?

Back

Area = 8 × 3 = 24 square units.

Front

If a rectangle has a length of 12 and a width of 4, what is its perimeter?

Back

Perimeter = 2 × (12 + 4) = 32.

Front

What is the formula for finding the area of a square?

Back

Area = side × side.