Geometry Problem: Prove AB=BE=EA

[ibc]

Homework Statement

http://img58.imageshack.us/img58/1977/49718826ce7.png

you need to prove that AB=BE=EA

Homework Equations

only that angleEDC = angleECD=15°
and ABCD is a square
and it should be solved used only geometry, with no trigo.

The Attempt at a Solution

nvm, got it

 

[newzad]

http://geometri-problemleri.blogspot.com/2009/11/problem-52-ve-cozumu.html