📐 Right Triangle Calculator
Solve any right triangle via Pythagoras.
Fill in any two of the three sides — the third is computed automatically via Pythagoras.
Right triangle
a · b · c
3 · 4 · 5
Area
6
Perimeter
12
Angle opposite a
36.8699°
Angle opposite b
53.1301°
Right angle
90°
Solve right triangles with the Pythagorean theorem (a² + b² = c²) — missing side, area, perimeter, and both acute angles. 100% client-side.
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