Area & Perimeter of Rectangles

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 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 a length of 5 units and a width of 3 units, what is its area?

Back

Area = 5 × 3 = 15 square units.

Front

If a rectangle has a length of 8 units and a width of 2 units, what is its perimeter?

Back

Perimeter = 2 × (8 + 2) = 20 units.

Front

What are the possible side lengths of a rectangle with an area of 20 square inches?

Back

Possible pairs include (1, 20), (2, 10), (4, 5).

Front

If one side of a rectangle is 4 units and the area is 12 square units, what is the other side?

Back

Other side = Area ÷ one side = 12 ÷ 4 = 3 units.

Front

What is the perimeter of a rectangle with side lengths of 6 cm and 4 cm?

Back

Perimeter = 2 × (6 + 4) = 20 cm.

Front

If a rectangle has a perimeter of 30 units and one side is 10 units, what is the other side?

Back

Let the other side be x. Then, 30 = 2 × (10 + x) => x = 5 units.