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The Unit Square in the Circle (Posted on 2018-11-10) Difficulty: 4 of 5
Cyclic quadrilateral ABCD is circumscribed by a unit circle. Let E, F be the orthocenters of ΔBCD, ΔACD respectively.

If ABEF is a square then find the area of the quadrilateral.

No Solution Yet Submitted by Danish Ahmed Khan    
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  Subject Author Date
Ill defined problem?Jer2018-11-10 22:56:35
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