# What is the length of the tangent segment from a circle to a common external point.

Submitted by DaveAtkNH on Wed, 04/06/2011 - 20:10.

What is the length of the segment of two tangent lines to a circle of known radius which meet at a known known angle at a common external point?

In the following link, what is the length PN (or PM) given the angle NPM and radius of the circle?

Answer