CalQuira

Triangle calculator

Solve right and general triangles from known sides and angles. Useful for geometry checks, roof work, and quick timber planning.

Known
Solve
a = 5b = --c = --α = 35°β = --°
a=--b=--c=--α=--°β=--°γ=--°
Known values
Choose the input set. Only the fields for that case stay active.

What is known?

Inputs

Solve for: Side b, Side c, Angle β

Triangle trig, short and useful

Triangle trigonometry links side lengths and angles. Once enough values are known, you can solve the rest or detect that the inputs do not form a valid triangle.

This tool supports right triangles and general triangles. It also shows when the SSA case can produce two valid solutions.

What matters most

  • Use Pythagoras for right triangles when two sides are known.
  • Use the sine rule and cosine rule for general triangles.
  • Always check whether your inputs describe one triangle, two triangles, or no valid triangle.