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duminică, 14 noiembrie 2021

Stanford Li, Training Geometry Olympiad, https://www.facebook.com/photo?fbid=10224737947489560&set=gm.582578046335846

 A synthetic solution:



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Mi Prepa, https://www.facebook.com/photo?fbid=1427344626075511&set=a.575642501245732

  Mi Prepa, https://www.facebook.com/photo?fbid=1427344626075511&set=a.575642501245732 In the interior of triangle ABC having ...