Triangle Solver — Structopedia

1Known Values

Enter any 3 values — sides a, b, c (any unit) and/or angles A, B, C (degrees). Opposite pairs: side a is opposite angle A, etc.

aSide a

bSide b

cSide c

AAngle A

BAngle B

CAngle C

Supported cases: SSS • SAS • ASA • AAS • SSA (ambiguous case flagged)

SSA ambiguous case — two solutions exist.

2Diagram

Triangle — to scale

Enter values above to solve the triangle.

3Results

aSide a

—

bSide b

—

cSide c

—

AAngle A

—

BAngle B

—

CAngle C

—

4Working

Step	Working	Value
Enter 3 known values to see working.

Note — This tool solves triangles using the Law of Sines and Law of Cosines. For the SSA case (side-side-angle), two solutions may exist — both are flagged. Verify independently before using results in structural calculations.