Definition of Hero's formula in US English:

Hero's formula

(also Heron's formula)

noun

Mathematics
  • A formula giving the area of a triangle in terms of the lengths of its sides.

Origin

Late 19th century. From the genitive of the name of Hero (also Heron) of Alexandria (fl. c a.d. 60), scientist and engineer, who described the formula.

Pronunciation

Hero's formula

/ˈhɪərəʊz ˌfɔːmjʊlə/