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FINALS - Portuguese Mathematical Olympiad (High-School) P2

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April 6, 2014
geometry unsolvedgeometry

Problem Statement

Let [ABCD][ABCD] be a square, MM a point on the segment [AD][AD], and NN a point on the segment [DC][DC] such that BM^A=NM^D=60∘B\hat{M}A = N\hat{M}D = 60^{\circ}. Calculate MB^NM\hat{B}N.