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What is the Pythagorean Theorem?
The Pythagorean Theorem Calculator finds the length of the hypotenuse (the longest side) of a right-angled triangle given the lengths of the other two sides.
How to Use This Calculator
1
Enter the length of side 'a'.
2
Enter the length of side 'b'.
3
Click 'Calculate' to find the length of the hypotenuse 'c'.
Example Calculation
a = 3, b = 4
c = √(3² + 4²) = √(9 + 16) = √25 = 5.
Frequently Asked Questions
Pro Tips
- The hypotenuse is always opposite the right angle.
- It is always the longest side of the triangle.