Geometria, altfel - probleme pentru concursuri
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joi, 12 august 2021
aops, lost problem, https://artofproblemsolving.com/community/c6t48f6h2643725_deleted_problem
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https://artofproblemsolving.com/community/c6h616123p3670325
This is my synthetic proof to the subject problem:
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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