In cyclic quadrilateral :ABCD the point :E is in the middle of:BC, the perpendicular on :BC pass the point:E and intersect :AB in:X ,and the perpendicular on:AD pass the point:E and intersect :CD in :Y ,what is the proof that: XY is perpendicular on :CD
I cant understand perfectly.Is there any diagram for this please provide it?
Thank you
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