Triangle Solver
Enter known values (SSS, AAS, ASA). Angles in degrees.
Side a
Side b
Side c
Angle A (°)
Angle B (°)
Angle C (°)
A triangle solver computes all unknown sides and angles of a triangle from the known values. It handles SSS (three sides), AAS/ASA (two angles and one side), and SAS cases.
- 1SSS: use the law of cosines to find angles
- 2AAS/ASA: use the law of sines after finding the third angle
- 3Third angle = 180° − (sum of other two)
- 4Area via Heron's formula once all sides are known
Sides 3, 4, 5=Angles: 36.87°, 53.13°, 90° — right triangle, Area = 6
Angles 30°, 60°, side 10=Remaining sides computed via law of sines
| Known | Method | First Step |
|---|---|---|
| SSS | Law of Cosines | Find largest angle first |
| AAS | Law of Sines | Find third angle (180−sum) |
| ASA | Law of Sines | Find third angle first |
| SAS | Law of Cosines | Find opposite side |
References
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