Menelaus's theorem
Geometric relation on line segments formed by a line cutting through a triangle
Menelaus's theorem
In Euclidean geometry, Menelaus's theorem, named for Menelaus of Alexandria, is a proposition about triangles in plane geometry. Suppose we have a triangle △ABC, and a transversal line that crosses BC, AC, AB at points D, E, F respectively, with D, E, F distinct from A, B, C. A weak version of the theorem states that | A F ¯ F B ¯ | × | B D ¯ D C ¯...
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