Triangle Calculator
Enter the three sides of any triangle to find its area (Heron's formula), perimeter, and all three interior angles (law of cosines). Works for any valid triangle.
Inputs
Results
Area
6 sq units
Perimeter
12
Semi-Perimeter
6
Angle A
36.8699°
Angle B
53.1301°
Angle C
90°
Frequently Asked Questions
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