Heron was one of the great mathematicians of antiquity and came up with this formula sometime in the first century BC,
although it may have been known earlier. He also extended it to the area of quadrilaterals and higher-order polygons.

Use the calculator on below to calculate the area of a triangle given 3 sides using Heron's formula.

Enter the three side lengths and press 'Calculate'. The area will be calculated.

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