Area and Perimeter of Rectangles

Front

What is the formula to calculate the area of a rectangle?

Back

Area = length × width.

Front

What is the formula to calculate the perimeter of a rectangle?

Back

Perimeter = 2 × (length + width).

Front

If a rectangle has a length of 4 units and a width of 3 units, what is its area?

Back

12 square units.

Front

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

Back

30 feet.

Front

What is the area of a rectangle with side lengths 2 by 8?

Back

16 square units.

Front

What is the area of a rectangle with side lengths 15 by 25?

Back

375 square feet.

Front

A rectangle has an area of 30 square units and one side length is 6 units. What is the other side length?

Back

5 units.

Front

Which expression would not help find the area of a rectangle? 5 + 10 or 5 × 10?

Back

5 + 10.

Front

If the length of a rectangle is doubled, how does that affect the area?

Back

The area is also doubled.

Front

If the width of a rectangle is halved, how does that affect the perimeter?

Back

The perimeter decreases.