Right Triangle Calculator
Calculate sides, angles, area, and perimeter using the Pythagorean theorem. Free and instant.
Calculate sides, angles, area, and perimeter of a right triangle. Uses the Pythagorean theorem a² + b² = c².
Results
a² + b² = c²
Sides: a = 3, b = 4, c = 5
Angles: A ≈ 53.1301023542°, B ≈ 36.8698976458°, C = 90°
Area: 6
Perimeter: 12
Right Triangle Calculator
This free right triangle calculator uses the Pythagorean theorem to find the missing side, then computes angles, area, and perimeter. Enter any two sides (a, b, or hypotenuse c). No sign-up required.
- a² + b² = c² for legs and hypotenuse
- Angles, area, and perimeter
- Copy and reset
- Mobile-friendly
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