SSA Triangle Calculator
Use the SSA Triangle Calculator for a transparent, instant calculation with validated inputs and cited sources. For a query such as “SSA Triangle Calculator”, enter the matching values and units below and review the stated assumptions.
How to use this calculator
Enter the requested values and units.
Review the assumptions and any warnings shown with the result.
Use the result together with the cited source and your real-world requirements.
Formula
Use the law of sines, sin(B)/b = sin(A)/a, test both B and 180° − B, reject impossible angle sums, and solve each valid remaining side.
Worked example
Worked example: Inputs: Side a: 7; Side b: 5; Angle A: 60 °. Outputs: Angle B: 38.213211 °; Angle C: 81.786789 °; Side c: 8.
Assumptions and limits
- The result depends on the values, units, and assumptions entered. It does not infer missing context.
Sources
- OpenStax, Rice University: Precalculus 2eReference material reviewed for the stated method, units, or domain. Confirm that its scope matches your use case. Reviewed 2026-08-14.
Related calculators
Frequently asked questions
How does the SSA Triangle Calculator work?
Use the law of sines, sin(B)/b = sin(A)/a, test both B and 180° − B, reject impossible angle sums, and solve each valid remaining side.
What should I enter?
Side a, Side b, Angle A
What should I verify?
Review the assumptions and any warnings shown with the result. The result depends on the values, units, and assumptions entered. It does not infer missing context.
Last updated 2026-08-14 · math-ssa-triangle-v1 · opportunity-content-2026-08-14 · Trusty Calculator Editorial Team