marți, 29 martie 2022
sâmbătă, 26 martie 2022
joi, 17 martie 2022
miercuri, 16 martie 2022
Geometria Top, Thanos, https://www.facebook.com/photo/?fbid=1377977119315096&set=gm.1159730481463986
I doubt the author performed annoying trigo calculations, so I tried to figure out such a solution, which you can see in the capture (in fact there is idea for a 2nd solution in Remark, that one I first saw):
duminică, 13 martie 2022
sâmbătă, 12 martie 2022
marți, 8 martie 2022
duminică, 6 martie 2022
vineri, 4 martie 2022
joi, 3 martie 2022
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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...
