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Triangle Calculator

Calculate triangle area, angles, perimeter using Heron's formula.

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Type: Scalene, Right
Perimeter
12.00
Area
6.00
∠A = 36.87°
∠B = 53.13°
∠C = 90.00°
◆ How it works

Triangle Calculator — 3 simple steps

01

Enter 3 sides

a, b, c

02

See angles

Using law of cosines

03

Get area

Heron formula

Frequently Asked Questions

Common questions about Triangle Calc

Our calculator uses standard formulas and updated rates for 100% accuracy. Results match official calculations.