KnowraMenelaus's theoremLinked fromLinked fromThe 13 pages that link to Menelaus's theorem, each with the reason it gives.All 13Broader topic 1Related 8Compared with 4CollinearityRelated: Its converse determines whether three side-intersection points are collinear.Triangle geometryRelated: It provides a complementary ratio test for collinearity across a triangle.Miquel's theoremRelated: Like Miquel's theorem, it turns a geometric configuration into a concise condition.Simson lineRelated: Directed side ratios offer an algebraic route to proving the three feet are collinear.Butterfly theoremRelated: Some synthetic proofs encode the collinear intersections through directed ratios.Monge's theoremRelated: Its directed-ratio relation proves collinearity of the three centers.Incenter–excenter lemmaRelated: It can test collinearity in configurations involving centers and sidelines.Seven circles theoremRelated: It can certify the final line once the relevant intersection ratios are known.