Proving XY is perpendicular on :CD

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

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Originally Posted by Mhmh96

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

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Is there a diagram for this? I can't seem to construct it.

-Dan

I cant understand perfectly.Is there any diagram for this please provide it?
Thank you
Bizworldusa

http://store2.up-00.com/Aug12/VlO05796.jpg