Geometry
Triangle Calculator
Lets users solve and check triangle instantly with formula, steps and examples — no manual math.
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Your result
Area
6 sq units
Heron's formula: area = 6.000.
Perimeter
12 units
Validity
Valid triangle
About this calculator
Triangle area from three sides via Heron's formula: s = (a+b+c)/2, area = √(s(s−a)(s−b)(s−c)). Requires the triangle inequality (each side < sum of the other two).
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