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In convex quadrilateral ABCD, ab=bc=13,cd=da=24 ,and angle D=60 . Points X  and Y are the midpoints of BC and DA respectively. Compute XY^2 (the square of the length of XY).

 Apr 8, 2020
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The question has already been answered by CPhill here.

 

 

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 Apr 8, 2020

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