Difference between revisions of "2013 USAJMO Problems/Problem 5"
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Revision as of 17:02, 3 July 2013
Problem
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 .
Solution
The problems on this page are copyrighted by the Mathematical Association of America's American Mathematics Competitions.