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luni, 12 ianuarie 2026

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duminică, 11 ianuarie 2026

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vineri, 9 ianuarie 2026

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marți, 6 ianuarie 2026

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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...