Pythagoras Theorem Calculator with examples

Please select the side you wants to calculate and enter the value of other two sides.

In a right angled triangle: the square of the hypotenuse is equal to the sum of the squares of the other two sides.

Suppose right triangle with sides a and b and hypotenuse c then c² = a² + b²

Or c = √(a² + b²)

Or a = √(c² - b²)

Or b = √(c² + a²)

2. Find the hypotenuse where two sides a = 4 and b = 3.

The formula for hypotenuse c = √(a² + b²)

= √(4² + 3²)

= √(4X4 + 3x3)

= √(16 + 9)

= √(25)

> =5