Triangle Calculator

Solve any triangle from SSS, SAS, ASA, AAS, or SSA. Enter at least 3 values (including at least 1 side length) then click Calculate.

Triangle Input

Angle Unit:

Angle C

Side b

Side a

Angle A

Side c

Angle B

Solving Methods

SSS — Law of Cosines to find all angles.
SAS — Law of Cosines to find the opposite side, then Law of Sines.
ASA / AAS — Third angle = 180° − A − B, then Law of Sines.
SSA (ambiguous) — Law of Sines; may yield 0, 1, or 2 solutions.