411 REFERENCE · Wiktionary
Heron's formula
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Alternative forms
Hero's formula
Etymology
Named after Hero of Alexandria.
Proper noun
The formula , where a, b, and c are the sidelengths of a triangle, s is its semiperimeter, and A is its area.
en eponyms
en Geometry