Triangle Solver
Solve a triangle from its three side lengths (SSS).
Calculations run in this browser. Values are not submitted to the server.
Result
Formula and assumptions
Uses the cosine rule to find angles and Heron’s formula to find area. Side lengths must satisfy the triangle inequality.
Example values are shown in the input placeholders. Results use browser number precision unless the tool uses exact integer arithmetic. Check units and assumptions before using a result.