Geometry - Chapter 10 Review - Area

Front

What is the formula for the area of a circle?

Back

Area = πr², where r is the radius.

Front

How do you calculate the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

What is the area of a circle with a radius of 5 inches?

Back

Area = π(5)² = 25π ≈ 78.5 in².

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × Radius.

Front

What is a sector in a circle?

Back

A sector is a portion of a circle enclosed by two radii and the arc between them.

Front

How do you find the area of a sector?

Back

Area of sector = (θ/360) × πr², where θ is the angle in degrees.

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 sum them up.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 × base × height.

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.