Solve any triangle given three known values (SSS, SAS, ASA, AAS) using trig laws.
This solver handles any triangle (right or oblique) using the Law of Cosines for SSS/SAS and the Law of Sines for ASA/AAS. It reports all sides, angles, area and perimeter.
Law of Cosines
c² = a² + b² − 2ab·cos C
Law of Sines
a/sin A = b/sin B = c/sin C
Area
Area = ½ · a · b · sin C
SSS if you know all three sides, SAS if you know two sides and the angle between them, ASA if you know two angles and the side between them, AAS if you know two angles and a non-included side.
Yes — a right triangle is a special case. Enter 90° as one angle in ASA/AAS mode, or enter two legs and 90° in SAS mode.