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In the figure above, a square ABCD of area 225, E is the intersection of BD and the semicircle of diameter AD, and CF is tangent to the semicircle. Then, what is the area of DEF?

 

 Jun 16, 2020
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https://web2.0calc.com/questions/i-really-need-help_17#r3  smiley

 Jun 16, 2020

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