Free Triangle Solver (Law of Sines & Cosines for SSS, SAS, ASA) Online
Solve any triangle given any 3 parameters (sides and angles) using the Law of Sines and Law of Cosines. Computes area, perimeter, and inradius. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Select Known Combination
Choose SSS (3 sides), SAS (side-angle-side), ASA, or AAS.
Input Measurements
Enter side lengths and angle degrees.
Inspect Solved Triangle
Review all 3 sides, all 3 angles, and total area.
Frequently Asked Questions
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