Web(CHNMOL/1991)ABCD is a trapezium withAB k CD andAB < DC. AC andBD intersect at E, EF k AB, intersecting BC at F. Given that AB = 20, CD = 80, BC = 100, thenEF is (A)10, (B)12, (C) 16, (D)18. 2. (AHSME/1986) In 4 ABC,AB = 8, BC = 7, CA = 6. Extend BC to P such that4 PAB ∼ 4 PCA, then the length ofPC is (A)7, (B)8, (C) 9, (D)10, (E)11. 3. WebAug 18, 2024 · 1.2K views 3 months ago. A Very Nice Problem of Quadratic Equation CHNMOL 1991 Problem Math Olympiad Practice Algebra .
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