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2013 USAJMO Problems/Problem 5

Revision as of 17:52, 11 May 2013 by Yuler1818181818 (talk | contribs) (Created page with "Quadrilateral is inscribed in the semicircle with diameter . Segments and meet at . Point is the foot of the perpendicular from to line . Point lies on such that line is perpendi...")
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Quadrilateral is inscribed in the semicircle with diameter . Segments and meet at . Point is the foot of the perpendicular from to line . Point lies on such that line is perpendicular to line . Let be the intersection of segments and . Prove that

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