Radius of Circle

Definition and Example

The Radius of a circle is the distance from the circle's center to its edge.

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

No matter how the line on the left rotates, it is always the circle's radius because it starts at the circle's middle and extends to the edge of the circle.

Ultimate Math Solver (Free)

Free Algebra Solver ... type anything in there!