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Two-fifths of a Square

Auteur :Bill Lombard
Thème :Cercle, Carré
Two-fifths of a Square A square inscribed in a semicircle has 2/5 the area of a square inscribed in a circle of the same radius. credit: Greg Ross http://www.futilitycloset.com/2013/11/25/some-odd-theorems/

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