https://www.facebook.com/photo/?fbid=9572397932828598&set=a.373249732743510,
miercuri, 30 aprilie 2025
marți, 29 aprilie 2025
sâmbătă, 26 aprilie 2025
Nice problem, lost source, again
Today I saw an old problem on fb geometry sites, with a very nice solution bearing the inconfoundable signature of Master Hasan Ata; attached, my own, which I think you will like! Oops, it's about quadrilateral ABCD, I missed the name!
marți, 8 aprilie 2025
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Geometria Super Top, Dong le Minh https://www.facebook.com/photo?fbid=4516632665291447&set=gm.2394306588006363&idorvanity=830782544358783
Note: I came up with the following proof 53 years ago, during an exam; as the majority of solvers used the 3 concurrent circumcircles of th...
