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<Qua-2025-783>, hint

작성자: komath

라벨: angle, quadrilaterals, solution

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<Tri-2024-2092?>. hint 1> L,M,N are centroids of triangles PBC, PCA, PAB [PELF]=[PEL]+[PFL]=1/3 [PBC] 2. Suppose PL,PM,PN cut sid...
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