1. ## Geometry problem

Can someone help me with this one? I am trying to solve it for days but i cannot...

2. ## Re: Geometry problem

Here's an easy way to do this: Suppose AC is perpendicular to BD. You then have two congruent right triangles. While that is a special case, it meets all of the hypotheses here. IF this problem has a single answer, that number has to be the answer for all cases.

nice thanks