8.5 Area of Composite Figures (Review)

Front

What is the formula for the area of a rectangle?

Back

Area = length × width

Front

How do you find the area of a triangle?

Back

Area = 1/2 × base × height

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 calculate the area of a composite figure?

Back

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

Front

What is the formula for the area of a circle?

Back

Area = π × radius²

Front

What is the circumference of a circle?

Back

Circumference = 2 × π × radius or π × diameter

Front

If the diameter of a circle is 10 cm, what is the radius?

Back

Radius = diameter / 2 = 5 cm

Front

What is the area of a semicircle with a diameter of 8 cm?

Back

Area = 1/2 × π × (radius)² = 25.13 cm²

Front

How do you find the area of a shaded region in a composite figure?

Back

Subtract the area of the unshaded part from the total area.

Front

What is the relationship between radius and diameter?

Back

Diameter = 2 × radius