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Geometry Problem 458: Square, Semicircle, Circular Sector, Internal Common Tangent, Measurement

The figure shows a square ABCD of side a. The semicircle of diameter AB and the circular sector of center D are tangent at E. If FG is the internal common tangent, prove that Formula to prove. See also: Artwork of Problem 458.

Problem 458: Square, Semicircle, Circular Sector, common tangent



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