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Thursday, September 2, 2010
15th British Mathematical Olympiad 1979 Problems
15th British Mathematical Olympiad 1979 Problems1. Find all triangles ABC such that AB + AC = 2 and AD + BD = √5, where AD is the altitude. 2. Three rays in space have endpoints at O. The angles between the pairs are α, β, γ, where 0 < α < β < γ. Show that there are unique points A, B, C, one on each ray, so that the triangles OAB, OBC, OCA all have perimeter 2s.
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