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Pythagorean Theorem Calculator

Solve right triangles using the Pythagorean theorem (a² + b² = c²). Calculate missing sides, find angles, verify triangle properties, and solve multiple triangles instantly.
Measurement Units
Basic Pythagorean Calculator

Calculate missing sides of a right triangle using a² + b² = c².

meters

meters

meters

Common Pythagorean Triples

• 3-4-5 • 5-12-13 • 6-8-10 • 7-24-25 • 8-15-17
• 9-40-41 • 20-21-29 • 12-35-37

a² + b² = c²
Pythagorean Theorem

Calculation:

c = √(a² + b²)
c = √(3² + 4²)
c = √(9.00 + 16.00)
c = 5.00 meters

Triangle Visualization:

/|
/ |
5.0 / | 4.0
/ |
/____|
3.0

Pythagorean Theorem Guide

The Pythagorean Theorem

a² + b² = c²
In any right triangle, the square of the length of the hypotenuse (c) equals the sum of the squares of the lengths of the other two sides (a and b).

Key Formulas
  • Find Hypotenuse: c = √(a² + b²)
  • Find Side A: a = √(c² - b²)
  • Find Side B: b = √(c² - a²)
  • Area of Right Triangle: A = ½ × a × b
  • Perimeter: P = a + b + c
Common Pythagorean Triples

These are sets of three positive integers that satisfy a² + b² = c²:

3-4-5
5-12-13
6-8-10
7-24-25
8-15-17
9-40-41
Real-World Applications

Construction: Ensuring right angles in buildings
Navigation: Calculating shortest distances
Engineering: Structural design and analysis
Surveying: Land measurement and plotting
Computer Graphics: 3D modeling and game development

Step-by-Step Example: Finding the Hypotenuse
Identify the known sides
Apply the formula: c = √(a² + b²)
Calculate squares: a² and b²
Add the squares: a² + b²
Take the square root: √(a² + b²)

Example: a = 6, b = 8
Step 1: 6² = 36, 8² = 64
Step 2: 36 + 64 = 100
Step 3: √100 = 10
Result: c = 10

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