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Problem Solving (PS) | Re: If ABCD is a square with area 625, and CEFD is a rhombus wit

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VeritasPrepKarishma wrote:

Area of shaded region = Area of square - (Area of rhombus - Area of triangle MFD)



Area of square = 625 so side = 25
Area of rhombus = 500. So altitude = 500/25 = 20
MF = root (25^2 - 20^2) = 15
Area of triangle MFD = (1/2) * 15 * 20 = 150

Area of shaded region = 625 - (500 - 150) = 275


Dear Karishma,

how do you get "MF = root (25^2 - 20^2) = 15"?
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