The area is 6 square units and the largest angle is 90Β°.
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Triangle Calculator
Enter the three sides of a triangle to solve its main measurements.
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Area = β(s(sβa)(sβb)(sβc)); Angles Use the Law of Cosines; s = (a+b+c) Γ· 2
View assumptionsFormula reviewCalcs at Hand Editorial TeamVerified 28 August 2026 Β· automated checks included
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How to read this result
Three useful checks, kept deliberately short.
A triangle with sides 3, 4 and 5: Check the triangle inequality Β· Use Heron's formula for area Β· Use the law of cosines for angles.
The side labels match the opposite angles A, B and C.
Formula and assumptions
Area = β(s(sβa)(sβb)(sβc)); Angles Use the Law of Cosines; s = (a+b+c) Γ· 2Any two side lengths must add to more than the remaining side.
Keep in mind: Results are rounded for display; the calculation retains full available precision.
Produced byCalcs at Hand Editorial Team
Last formula check28 August 2026
Review methodKnown examples + boundary cases
Editorial and correction policy β