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Pythagorean Theorem Calculator Information

What is the Pythagorean Theorem?

The Pythagorean theorem states that in a right triangle, the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides:

a² + b² = c²
  • a = One leg
  • b = Other leg
  • c = Hypotenuse

Example: a = 3, b = 4

c = √(3² + 4²) = √(9 + 16) = √25
c = 5
The hypotenuse is always the longest side of a right triangle.

Why Use the Pythagorean Theorem?

  • Geometry: Find missing sides in right triangles
  • Construction: Ensure corners are square and layouts are accurate
  • Navigation: Calculate straight-line distances
  • Everyday Life: Solve problems involving ladders, ramps, and more

Tips for Accurate Calculation

  • Use Consistent Units: All sides must be in the same unit (e.g., cm, in, m)
  • Check for Right Angle: The theorem only applies to right triangles
  • Double-Check Inputs: Enter values carefully to avoid errors

Frequently Asked Questions (FAQ)

Q: What is a hypotenuse?

A: The hypotenuse is the longest side of a right triangle, opposite the right angle.

Q: Can I use this for non-right triangles?

A: No, the Pythagorean theorem only applies to right triangles.

Q: Can I use any units?

A: Yes! Enter your values in any unit (cm, in, m, ft, etc.) and the result will be in the same unit.

Q: What if I have decimals?

A: The calculator works with decimals and whole numbers.

Q: What if my triangle isn't right-angled?

A: Use the Law of Cosines for non-right triangles.

Important Disclaimers

Disclaimer: This calculator provides estimates for educational purposes only. Pythagorean theorem calculations are based on standard geometric principles.

For critical applications such as construction, engineering, or surveying, always verify results with professional tools and consult with qualified professionals.

This calculator is not a substitute for professional geometric software or expert consultation. Always use appropriate precision for your specific use case.