Triangle Calculator (SSS)
Solve a triangle from its three sides: angles, area (Heron's formula), perimeter, heights, inradius, circumradius and triangle type.
How to use the Triangle Calculator
- Enter or select: Side a, Side b, Side c.
- The results (Angle A, Angle B, Angle C, Area, Perimeter, Inradius, Circumradius, Type) are calculated instantly as you type.
- Use βCopy linkβ to share the calculation with the same input values.
Formula
- Area = β(s(sβa)(sβb)(sβc)), s = (a+b+c)/2
- cos A = (bΒ² + cΒ² β aΒ²)/2bc