Triangle Calculator
Calculate triangle properties with visual representation
Triangle by Three Sides (SSS)
Triangle by Side-Angle-Side (SAS)
Calculate Area
Triangle Calculator Information
Triangle Inequality
The sum of any two sides must be greater than the third side for a valid triangle.
Angle Sum
The sum of all interior angles in a triangle is always 180°.
Pythagorean Theorem
For right triangles: a² + b² = c², where c is the hypotenuse.
Heron's Formula
Area = √[s(s-a)(s-b)(s-c)], where s is the semi-perimeter.