TR-MO-R1 2012 Problem 13
Köşeleri, düzlemdeki herhangi üçü doğrudaş olmayan 20 noktadan oluşan bir kümeye ait olan en çok kaç geniş açılı üçgen bulunabilir?
a) b) c) d) e)
Official text Turkish Mathematical Olympiad, first round 2012 official paper, page 5. Quoted with source.
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