# CGMO 2012 ( China Girls Math Olympiad 2012) Problem 5

As shown in the figure below, the in-circle of is tangent to sides and at and respectively, and is the circumcenter of . Prove that .

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Posted on Saturday,August 18, 2012, in Geometry, Problems and tagged CGMO 2012, chinese girls mathematics olympiad, geometry problems. Bookmark the permalink. Leave a comment.

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