# How to find radius of an arc or segment?

#### by sithurajkumar[ Edit ] 2011-08-06 12:32:15

**How to find radius of an arc or segment?**
The radius of an arc or segment is the radius of the circle of which it is a part. A formula is provided below for the radius given the width and height of the arc.

The formula for the radius is:

where:

W is the length of the chord defining the base of the arc

H is the height measured at the midpoint of the arc's base.