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Hero's formula

American

[heer-ohz] / ˈhɪər oʊz /

noun

Geometry.

the formula for the area of a triangle when the sides are given: for a triangle with sides a, b, and c, the area is equal to , where s is equal to one half the perimeter of the triangle.

Named after Hero of Alexandria

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023