Pythagorean Theorem Calculator

Calculate Triangle Sides with Precision

Welcome to our free Pythagorean theorem calculator! Whether you're a student, teacher, or professional, this tool helps you quickly find the missing side of any right triangle. Simply enter two known sides, and we'll calculate the third using the famous formula: a² + b² = c².

Triangle Visualization

Understanding the Pythagorean Theorem

The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse (c) equals the sum of squares of the other two sides (a and b). This fundamental mathematical principle has countless real-world applications in:

  • Architecture and Construction
  • Engineering and Design
  • Navigation and Surveying
  • Computer Graphics and Gaming

How to Use This Calculator

  1. Enter the known lengths of any two sides of your right triangle
  2. Click "Calculate" to find the missing side
  3. View the result and interactive triangle visualization
  4. Use "Reset" to start a new calculation

Pro Tips for Accurate Results

  • Always measure your known sides accurately
  • Remember that side C is always the hypotenuse (longest side)
  • Use decimal points for more precise measurements
  • Verify your results with the visual representation

Common Applications

Our Pythagorean theorem calculator is perfect for:

  • Homework and math assignments
  • Construction project planning
  • DIY home improvements
  • Engineering calculations
  • Game development
  • Interior design planning