Menelaus' theorem

noun
Men·e·la·us' theorem | \ ¦menə¦lāəs(ə̇z)- \

Definition of Menelaus' theorem 

: a theorem in geometry: if through a triangle ABC a transversal is drawn cutting the sides BC, AB, AC (produced if necessary) in the respective points p, q, r, then the product Aq×Bp×Cr is numerically equal to the product Bq×Cp×Ar

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History and Etymology for Menelaus' theorem

after Menelaus, 1st century a.d. Greek geometer

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