Area and Perimeter Missing Sides (4th Grade)

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 10 units and a width of 5 units, what is its perimeter?

Back

Perimeter = 2 * (10 + 5) = 30 units

Front

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

Back

Area = length * width

Front

If a rectangle has an area of 50 square feet and a width of 10 feet, what is the length?

Back

Length = Area / Width = 50 / 10 = 5 feet

Front

What is the missing side length if the perimeter of a rectangle is 26 units and one side is 9 units?

Back

Missing side = (Perimeter / 2) - 9 = (26 / 2) - 9 = 8 units

Front

If the perimeter of a rectangle is 28 units, what is the missing side length if the other side is 7 units?

Back

Missing side = (Perimeter / 2) - 7 = (28 / 2) - 7 = 7 units

Front

What is the definition of perimeter?

Back

Perimeter is the total distance around a shape.

Front

What is the definition of area?

Back

Area is the amount of space inside a shape.

Front

If a rectangle has a length of 12 units and a width of 4 units, what is its area?

Back

Area = 12 * 4 = 48 square units

Front

What is the missing side length if the area of a rectangle is 40 square feet and the width is 5 feet?

Back

Length = Area / Width = 40 / 5 = 8 feet