Triangle Problem Solver

Compute sides, angles, area, perimeter, and more using common triangle inputs.

Results Angles in degrees
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Input reference
  • SSS: Provide three sides a, b, c (triangle inequality must hold).
  • SAS: Provide sides b, c and the included angle A (between b and c).
  • ASA: Provide angles A, B and the included side c.
  • AAS: Provide angles A, B and non-included side a.
  • SSA: Provide sides a, b and non-included angle A (ambiguous case).
  • Base-Height: Provide base and corresponding height to compute area.

Formulas used: Heron's formula, Law of Cosines, Law of Sines, r = A/s, R = abc/(4A), h_a = 2A/a.