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Semicircle DE has a right triangle DEF placed over it, where point F is exterior to the semicircle. Let the region......

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Semicircle DE has a right triangle DEF placed over it, where point F is exterior to the semicircle. Let the region inside the semicircle not overlapping the triangle have area a, and let the region outside the semicircle contained by the triangle have area b. If a = b + 47, and DE = 20, what is the length of EF?
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posted Oct 27, 2022 by Nikhil Pandey

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