Proposition
Let ABC be a triangle and MEN a line that transverse (crosses) the lines AB, BC, and AC respectively. Prove that (AM.BE.CN)/(MB.EC.NA)=-1. The converse also holds.
See complete interactive proof with animation and key concepts
Level: High School, SAT Prep, College geometry
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Thursday, July 31, 2008
Menelaus' Theorem Proof
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