Pythagorean Theorem Calculator

Calculate the missing side of a right-angled triangle using the Pythagorean theorem.

Calculate Triangle Side

What is the Pythagorean Theorem?

The Pythagorean Theorem is a fundamental rule in geometry that relates the three sides of a right-angled triangle. It states that the square of the hypotenuse equals the sum of the squares of the other two sides.

Why use this Pythagorean Theorem Calculator?

• ✔ Solve geometry problems quickly
• ✔ Useful for students, engineers & architects
• ✔ Eliminates manual square-root calculations
• ✔ Instant and accurate results

Pythagorean Theorem Formula

c² = a² + b²
c = √(a² + b²)
  

Example

If side a = 3 and side b = 4:

• c = √(3² + 4²) = √25 = 5

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