Question 242906
If you draw the picture, you might get


<img src="http://i150.photobucket.com/albums/s91/jim_thompson5910/Algebra%20dot%20com/geo_figure1.png">



note: there's more than one way to draw it, but the idea should be the same.



Here's how the proof would go:



<img src="http://i150.photobucket.com/albums/s91/jim_thompson5910/Algebra%20dot%20com/two_column_proof.png">