Geometria, altfel - probleme pentru concursuri
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joi, 11 mai 2023
Romantics of Geometry, 12479, Stanley Rabinowitz
In the attachment
sâmbătă, 6 mai 2023
Stanley Rabinowitz, Romantics of Geometry, "plum challenge"
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ToT2, pr. 1, 2
Own problem
Own maybe...
IGO 2014, aops, Morteza Saghafian, https://artofproblemsolving.com/community/c6t48f6h1677987_equal_angles_when_ltc__lta__90o