Math
Triangle Calculator
Area and angles from three sides.
Result
6.000
Area (Heron's formula)
Angle A
36.87°
Angle B
53.13°
Angle C
90.00°
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Quick summary
Compute the area and interior angles of a triangle given its three sides.
How to calculate triangle manually
- Area uses Heron's formula.
- Angles use the law of cosines.
Compute the area and interior angles of a triangle given its three sides.
How it works
Area uses Heron's formula. Angles use the law of cosines.
Example
3-4-5 triangle → area 6, angles 36.87° / 53.13° / 90°.
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