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September 24th, 2013, 04:37 AM  #1 
Newbie Joined: Sep 2013 Posts: 6 Thanks: 0  Acute triangle and circle
On sides BC, CA, AB of the acute triangle ABC lies respectively points D, E, F where FA=FE and FB=FD. Prove that the orthocenter of ABC lies on the circle which is passing through the points C, D, E


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acute, circle, triangle 
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