MathWord

Math Terms and Definitions from A to Z

Unit Circle

A unit circle is a circle with a radius of 1. The use of the term “unit” here is intended to imply that when the radius of a circle is measured, it must have a length of 1.

Example 1: A unit circle centered at the origin, (0,0).

a unit circle where its center is found at (0,0)

Example 2: A unit circle centered at (-2,2).

a unit circle where its center is found at (-2,2). a unit circle doesn't have to be centered at the origin