Triangle Calc

Calculate triangle area, perimeter, angles, and type from sides and angles.

Type DetectionAll Angles100% Private

Enter the three sides of a triangle

Side A

Side B

Side C

Scalene

Area

14.6969

Perimeter

18.0000

Angle A

44.42 deg

Angle B

57.12 deg

Angle C

78.46 deg

Inradius

1.6330

Circumradius

3.5722

FAQ

How is the area calculated?

The tool uses Heron's formula: Area = sqrt(s(s-a)(s-b)(s-c)), where s is the semi-perimeter (a+b+c)/2.

What triangle types are detected?

Equilateral (all sides equal), Isosceles (two sides equal), Scalene (all different), Right (one 90-degree angle), and Right Isosceles.

How are angles calculated?

Angles are calculated using the Law of Cosines. For example, angle A = arccos((b^2 + c^2 - a^2) / (2bc)).

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