TriSolve

Triangle Calculator

Three given parts — sides, angles, or a mix — solve the whole triangle, including area.

Side a

Side b

Side c

Which laws apply

Law of Cosines handles SSS and SAS cases. Law of Sines handles ASA. Right triangles have shortcuts via Pythagoras and basic trig.

Three percentage modes with step-by-step explanations.

Add, subtract, multiply, and simplify fractions.

Trig, logs, powers, and a running history tape.

Solve linear and quadratic equations instantly.