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Hypotenuse Calculator

Calculate the hypotenuse of a right triangle using the Pythagorean theorem. Find missing sides with step-by-step solutions and visual diagrams.

Triangle Calculator

Pythagorean Theorem

Basic Formula: a² + b² = c²
Find Hypotenuse: c = √(a² + b²)
Find Side: a = √(c² - b²)
Right Angle: Always 90° in a right triangle

Special Right Triangles

45-45-90 Triangle:
Sides ratio: 1 : 1 : √2
If legs = 1, then hypotenuse = √2 ≈ 1.414
30-60-90 Triangle:
Sides ratio: 1 : √3 : 2
If short leg = 1, then long leg = √3, hypotenuse = 2
Pythagorean Triples:
Common examples: (3,4,5), (5,12,13), (8,15,17)

Understanding the Pythagorean Theorem

The Pythagorean theorem is one of the most famous mathematical principles, discovered by the ancient Greek mathematician Pythagoras around 500 BCE. It provides a fundamental relationship between the sides of right triangles.

Key Concepts:

  • Right Triangle: A triangle with one 90-degree angle
  • Hypotenuse: The longest side, opposite the right angle
  • Legs: The two shorter sides that form the right angle
  • Square Relationship: The theorem relates the squares of the sides

Mathematical Proof:

The theorem can be proven geometrically by arranging four identical right triangles around a square. The area relationships demonstrate that a² + b² must equal c².

Real-World Applications:

  • Construction: Ensuring buildings have square corners
  • Navigation: Finding shortest distances between points
  • Engineering: Calculating structural forces and tensions
  • Computer Graphics: Distance calculations in 2D and 3D space
  • Architecture: Designing roofs, stairs, and ramps

Historical Significance:

While named after Pythagoras, versions of this theorem were known to Babylonians, Indians, and Chinese mathematicians centuries earlier. It remains one of the most important theorems in mathematics and has hundreds of different proofs.

Frequently Asked Questions - Hypotenuse Calculator

The Pythagorean theorem states that in a right triangle, the square of the hypotenuse (the longest side) equals the sum of squares of the other two sides: a² + b² = c².