It is back! This one is an original problem of mine. Have fun!
BEDC is quadrilateral satisfying BE=DC, the diagonals interset at F . Let G,H=F be on the segments CE,BD such that EG=CF,BH=DF. If BE∩DC=A, prove that AH,AG are isogonals wrt ∠BAC.
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Sorry for being off topic, but I have no knowledge of certain areas of advanced geometry like Homothety, which are not in wikis. I was wondering if there was a way you could provide me resources, Xuming. Thanks.
Easy Math Editor
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Eduardo Elael, were are your???
Sorry for being off topic, but I have no knowledge of certain areas of advanced geometry like Homothety, which are not in wikis. I was wondering if there was a way you could provide me resources, Xuming. Thanks.