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Right Triangle Solver

Solve for any unknown sides or non-right angles of a right triangle given any two values. Uses the Pythagorean theorem and SOH-CAH-TOA. Includes an interactive draggable visualizer.

a = 3.00b = 4.00c = 5.00A = 36.9°B = 53.1°CABDrag vertically to change side aDrag horizontally to change side b
Drag the open circles to change the legs. Live-updated values: hypotenuse 5.00 · area 6.00 · angles 36.9° / 53.1° / 90°. Press Calculate for the full source-cited result.

Limitations: Right triangles only (one angle = 90°). Non-right triangles (general SSS / SAS / ASA) require the law of sines / cosines — a separate tool.

What to do next: Leave your unknown blank, fill any TWO of the remaining (two sides, or one side + one acute angle). Angle inputs are in DEGREES.