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

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2. Relevant equations

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3. The attempt at a solution

Hi. This question is on geometry with circle and triangle. I am stuck only on 2 parts of the solution and not the whole solution...

Thank you....

http://img256.imageshack.us/img256/9475/gtewp249no24.jpg [Broken]

[ How did they get this? They never explained or proved this and it is NOT obvious from the picture.

Blue: How is that implication true? By what theorem or reasoning?

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# Inequality with Circle and Triangle in Euclidean Geometry

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