Area and Perimeter: Find the missing side

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 find the area of a rectangle?

Back

Multiply the length by the width (Area = Length × Width).

Front

How do you find the perimeter of a rectangle?

Back

Add the lengths of all four sides (Perimeter = 2 × Length + 2 × Width).

Front

If the area of a rectangle is 48 square units and the width is 6 units, what is the length?

Back

Length = Area ÷ Width = 48 ÷ 6 = 8 units.

Front

If the perimeter of a rectangle is 60 units and the width is 20 units, what is the length?

Back

Length = (Perimeter ÷ 2) - Width = (60 ÷ 2) - 20 = 10 units.

Front

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

Back

Area = Side × Side (or Area = Side²).

Front

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

Back

Perimeter = 4 × Side.

Front

If the area of a rectangle is 12 square units and the width is 3 units, what is the length?

Back

Length = Area ÷ Width = 12 ÷ 3 = 4 units.

Front

If the perimeter of a rectangle is 12 units and the length is 8 units, what is the width?

Back

Width = (Perimeter ÷ 2) - Length = (12 ÷ 2) - 8 = -4 units (not possible, check values).