(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://img98.imageshack.us/img98/371/physicsproblemrh8.jpg [Broken]

2. Relevant equations

3. The attempt at a solution

Basically, I tried to use triangles to find the angles. But I don't know how as it seems I'm only given one side of the triangles.

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# Homework Help: Refraction Problem

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