The Pythagorean theorem connects the sides of a right triangle.
Pythagorean Theorem Calculator
Form
Results
perimeter = a + b + c
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Table of Contents
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What is Pythagorean Theorem?
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How to Use This Calculator
- Enter or select Side length a, Side length b, Side length c.
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
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Formula Used
a² + b² = c², where c is the hypotenuse
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Variables Explained
| Input | What it means |
|---|---|
| Side length a | The measured end-to-end distance of the section being calculated. |
| Side length b | The measured end-to-end distance of the section being calculated. |
| Side length c | The measured end-to-end distance of the section being calculated. |
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Worked Example
Legs 3 and 4 give hypotenuse √25 = 5.
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Why Use This Calculator?
Recover a missing side in a right-triangle measurement.
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Common Mistakes
- The longest side must be c, and the triangle must have a right angle.
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Frequently Asked Questions
Should I round numbers before calculating?
Keep the original input precision through the calculation and round the final answer to the precision you need. Rounding an intermediate result can change later steps.
Why can a manual calculation differ slightly?
Check the operation, units, signs and rounding first. Equivalent fractions or expressions can look different while representing the same value.
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Sources & References
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