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Qua-2015-400,circle

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작성자: komath

라벨: circle, problem, quadrilaterals, square

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<Solid-2025-261 >, hint Let P on AB, Q on BC, R on,CD, S on DA such that PQRS is a rhombus. For PS//QR, PQ//SR, AP/PB=x/(1-x), ...
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>
Tri-2020-1780, construction, general
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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>
Cir-2018-634, concyclic

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Tri-2019-1677, hint

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Cons-2007-80, angle

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Qua-2015-400,circle

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