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Right Triangle Calculator
Enter the two legs — hypotenuse, area and angles update instantly.
Formula
c = √(a²+b²) | Area = a·b/2 | A = arctan(a/b), B = arctan(b/a)
Example
a = 3, b = 4 → c = 5, Area = 6, angle A = 36.87°.
FAQ
What is the Pythagorean theorem?
In a right triangle the square of the hypotenuse equals the sum of squares of the legs: a² + b² = c².
What is a 3-4-5 triangle?
The classic right triangle with integer sides. Any multiple (6-8-10, 30-40-50…) is also a right triangle — used for squaring layouts on site.