Pythagorean Theorem Calculator
Use the Pythagorean theorem to find the missing side of a right triangle (a² + b² = c²).
—
Hypotenuse (c)
—
Triangle Area
—
Perimeter
Recent Calculations
What Is Pythagorean Theorem?
The Pythagorean theorem states that in a right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides.
Formula
a² + b² = c², so c = √(a² + b²)Example
A right triangle with sides 3 and 4 has a hypotenuse of √(9 + 16) = √25 = 5.
Frequently Asked Questions
What is the Pythagorean theorem?
In any right triangle, a² + b² = c², where c is the longest side (hypotenuse) opposite the right angle.
Can I find a leg if I know the hypotenuse?
Yes. If c and b are known, a = √(c² − b²).