(adsbygoogle = window.adsbygoogle || []).push({}); The problem statement, all variables and given/known data

http://i49.tinypic.com/2hyexk2.jpg

Find the blue angle. My apologies that the picture is not drawn to scale (some angles are misrepresented by the picture).

In case you have difficulties reading the picture, the angles are from the top, clockwise:

20, 10, 70, 60, 20

The attempt at a solution

http://i45.tinypic.com/jh39qa.jpg

These are all the angles labeled that can be easily proved. That's as far as my knowledge goes.

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# Homework Help: Simple Geometry Problem

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