## Problem of the Day #213: Length of an Angle Bisector
*October 18, 2011*

*Posted by Saketh in : potd , trackback*

Triangle $ABC$ has sides of length $39$, $48$, and $71$. The bisector of angle $A$ cuts $BC$ at point $D$. Find the length of $AD$ in terms of $cos(\frac{A}{2})$.

## Comments»

no comments yet - be the first?