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SOLUTION
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Qua-2018-566, hint

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작성자: komath

라벨: quadrilaterals, solution

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Trigo-2007-69, tan

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<Tri-2025-2189>, hint
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<Tri-2025-2270>, general, tangent <Russia Regional Olympiad 2003>
Cir-2018-634, concyclic

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<Cir-2024-760>, hint Let M be the midpoint of PQ and O' S O" cuts O" at N . Quadrilaterals SMPO' and SO"QM are...
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<Tri-2025-2226>, general, bisector <Romania District Olympiad 2005>
Tri-2019-1677, hint

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Cons-2007-80, angle

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Qua-2018-566, hint

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