Created with MicroStation [ Ссылка ] this clip presents a puzzle where all the vertices of a 15 x 15 square are joined to points on the opposite side that divide it in the ratio 1:2. By symmetry another, smaller square is formed, whose area is to be found. The puzzles is solved two ways. First the simple, fun way like a puzzle and then the tedious trigonometric method like a math problem.

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