Triangle Solver

Drag the vertices, or type any side or angle straight into the values below. Everything updates live.

Drag any vertex. Side a is opposite angle A.

Values

click any value to edit it

A (°)

B (°)

C (°)

Editing a side re-solves from all three sides (SSS); editing an angle re-solves from that angle and its two adjacent sides (SAS). Press Enter or click away to apply.

Area

Perimeter