Math
Right Triangle Calculator
Solve a right triangle given any two of: leg a, leg b, hypotenuse c, or an acute angle.
Inputs
Right Triangle Calculator
Result
Hypotenuse c
5
- Leg a
- 3
- Leg b
- 4
- Angle A
- 36.87°
- Angle B
- 53.13°
- Area
- 6
- Perimeter
- 12
How it's calculated
c = √(a² + b²). sin A = a/c, cos A = b/c, tan A = a/b. A + B = 90°.
Common questions
Which side is the hypotenuse?
The hypotenuse is the side opposite the 90° angle — always the longest side of a right triangle.
Can I solve from one side and one angle?
Yes. Given a leg and an acute angle, trigonometry recovers the other leg and the hypotenuse.
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