Hero's formula
[ 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.
, where s is equal to one half the perimeter of the triangle.Origin of Hero's formula
named after Hero of Alexandria
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019