3 Area and Perimeter: RL #3 (Work Backwards)

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 is the formula for calculating the area of a rectangle?

Back

Area = Length × Width

Front

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

Back

Area = 4 × 3 = 12 square meters

Front

What does it mean to 'work backwards' in a math problem?

Back

It means to start with the answer and use it to find the missing information.

Front

If the perimeter of a rectangle is 24 feet and the length is 8 feet, what is the width?

Back

Width = (Perimeter/2) - Length = (24/2) - 8 = 4 feet

Front

What is the relationship between area and perimeter?

Back

Area measures the space inside a shape, while perimeter measures the distance around it.

Front

If a square has a side length of 6 cm, what is its perimeter?

Back

Perimeter = 4 × Side = 4 × 6 = 24 cm

Front

If a rectangle has a perimeter of 40 cm and one side is 10 cm, what is the other side?

Back

Other side = (Perimeter/2) - Side = (40/2) - 10 = 10 cm

Front

What is the area of a rectangle with a length of 7 yards and a width of 3 yards?

Back

Area = 7 × 3 = 21 square yards