6 Area and Perimeter Work backwards

Front

What is the formula for calculating the area of a rectangle?

Back

Area = Length × Width

Front

If a rectangle has an area of 20 square feet and a width of 4 feet, what is the length?

Back

Length = Area ÷ Width = 20 ÷ 4 = 5 feet

Front

What is the formula for calculating the perimeter of a rectangle?

Back

Perimeter = 2 × (Length + Width)

Front

If a rectangle has a length of 10 feet and a width of 5 feet, what is its perimeter?

Back

Perimeter = 2 × (10 + 5) = 30 feet

Front

What does 'area' mean in geometry?

Back

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

Front

What does 'perimeter' mean in geometry?

Back

Perimeter is the total distance around a shape.

Front

If a lawn has an area of 35 square feet and a width of 5 feet, how long is it?

Back

Length = Area ÷ Width = 35 ÷ 5 = 7 feet

Front

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

Back

Area = 8 × 3 = 24 square feet

Front

If the perimeter of a rectangle is 24 feet and the width is 6 feet, what is the length?

Back

Length = (Perimeter ÷ 2) - Width = (24 ÷ 2) - 6 = 6 feet

Front

What is the area of a rectangle with a length of 12 feet and a width of 4 feet?

Back

Area = 12 × 4 = 48 square feet