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vineri, 17 decembrie 2021

aops, https://artofproblemsolving.com/community/c4t48f4h2735489_find_the_angle_oie

 Not a nice proof, but synthetical!


la

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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 ...