Math & Statistics
Pythagorean Theorem Calculator
Find a missing side of a right triangle using the Pythagorean theorem.
TOOL 31
Enter your values
Use the fields below to calculate your result.
Result
5
Equationc² = a² + b²
Answer5
Formula: c² = a² + b² for a right triangle.
Select the unknown side, then enter the other two sides. For a missing leg, the known hypotenuse must be the larger value.
How to use this calculator
What to enter
Enter or select the following as requested: Find; Known side 1; Known side 2. Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The result is the geometric quantity derived from the triangle dimensions, side lengths, angles, or relationship requested by this tool. Check whether angles are in degrees or radians and whether the given measurements satisfy the stated triangle conditions.
When to use it
Use this to solve a triangle or verify a geometric relationship. Keep units consistent and check the diagram and assumptions shown by the calculator.