Geometria, altfel - probleme pentru concursuri
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miercuri, 21 iulie 2021
Kyiv, https://artofproblemsolving.com/community/c6h2620399p22645030
Solution with my son (I made ... the drawing, he the proof, so it's even!)
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https://artofproblemsolving.com/community/c6t48f6h3304019
ToT2, pr. 1, 2
Own problem
Own maybe...
IGO 2014, aops, Morteza Saghafian, https://artofproblemsolving.com/community/c6t48f6h1677987_equal_angles_when_ltc__lta__90o
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