Diameter of Circle

Definition and Example

The diameter of a circle is the distance from one edge of the circle to the other edge and, most importantly, through the circle's center.

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 diameter because the line extends from one edge of the circle to the other and the line goes through the circle's center.

Ultimate Math Solver (Free)

Free Algebra Solver ... type anything in there!