Solve right triangle sides with steps and diagram.. Pythagorean Calculator is a free online tool from the ToolsRift Math Calculators collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.
Enter any two of the three sides (legs a, b or hypotenuse c) and leave the unknown blank; the missing side is solved with steps shown.
In a right triangle, a² + b² = c², where c is the hypotenuse (the longest side, opposite the right angle).
Yes — leave any one side blank and it solves for it, e.g. b = √(c² − a²).
The Pythagorean theorem only applies to right triangles; use the triangle solver for other triangles.