Copyright © University of Cambridge. All rights reserved.

## 'Circle-in' printed from http://nrich.maths.org/

A circle is inscribed in a triangle which has side lengths of
$8, 15$ and $17 \; \text{cm}$.

What is the radius of the circle?

Can you adapt your method to find the radius of a circle
inscribed in any right-angled triangle $ABC$?