Menelaus’ Theorem

Related Overviews


'Menelaus’ Theorem' can also refer to...


More Like This

Show all results sharing this subject:

  • Mathematics


Show Summary Details

Quick Reference

The following theorem, due to Menelaus of Alexandria:


Let L, M and N be points on the sides BC, CA and AB of a triangle (possibly extended). Then L, M and N are collinear if and only if

(Note that BC, for example, is considered to be directed from B to C so that LC, for example, is positive if LC is in the same direction as BC and negative if it is in the opposite direction; see measure.) See Ceva's Theorem.

Subjects: Mathematics.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.