Area and Perimeter

Front

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

Back

Perimeter = 2 × (length + width)

Front

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

Back

Perimeter = 2 × (10 + 5) = 30 inches

Front

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

Back

Area = length × width

Front

If a rectangle has a length of 8 feet and a width of 4 feet, what is its area?

Back

Area = 8 × 4 = 32 square feet

Front

What is the perimeter of a square with each side measuring 6 cm?

Back

Perimeter = 4 × side = 4 × 6 = 24 cm

Front

What is the area of a square with each side measuring 5 meters?

Back

Area = side × side = 5 × 5 = 25 square meters

Front

If the perimeter of a rectangle is 40 cm and the length is 15 cm, what is the width?

Back

Width = (Perimeter/2) - length = (40/2) - 15 = 5 cm

Front

What is a composite figure?

Back

A composite figure is a shape made up of two or more simple shapes.

Front

How do you find the area of a composite figure?

Back

Find the area of each simple shape and then add them together.

Front

If a composite figure consists of a rectangle (5 cm by 3 cm) and a triangle (base 3 cm, height 4 cm), what is the total area?

Back

Area of rectangle = 5 × 3 = 15 cm²; Area of triangle = 1/2 × base × height = 1/2 × 3 × 4 = 6 cm²; Total area = 15 + 6 = 21 cm²