Chapter 1
Chapter 1 Basic Math
Course: Ged Test Prep
Subject: Mathematics
Chapter: Chapter 2 Geometry
Area, circumference, radius, and diameter of a circle
The area of a circle is the amount of space inside the circle and is calculated using the formula A = πr², where r is the radius of the circle.
The circumference of a circle is the distance around the circle and is calculated using the formula C = 2πr or C = πd, where r is the radius and d is the diameter of the circle.
The radius is the distance from the center of the circle to any point on the circle, and the diameter is the distance across the circle passing through the center.
Example 1
Example 2