Calculated result
Enter measurements and select Calculate.
General-triangle method
SSS uses the law of cosines and Heron’s formula. SAS uses the included angle to solve the third side. ASA/AAS finds the third angle and uses the law of sines.
Ownership and validation
This general solver rejects degenerate side sets and invalid angle sums. The existing Pythagorean Theorem Calculator remains the focused right-triangle missing-side tool; ambiguous SSA is excluded.
Worked example
The editable example values above demonstrate the formula and expose each assumption used in the result.