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Heron's Formula Calculator

Triangle area from three sides using Heron formula

Heron's Formula — Triangle Area

Side a
Side b
Side c
Area = √(s(s−a)(s−b)(s−c)) where s = (a+b+c)/2

Heron's formula calculates the area of a triangle from its three side lengths alone, without needing the height. It was discovered by the ancient Greek mathematician Hero of Alexandria.

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