ClarityHow to use this tool
- Enter first leg, second leg.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
Input reference and sample values
Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.
| Input | Format and units | Sample |
|---|---|---|
| First leg | Numeric value. Zero or positive. | 3 |
| Second leg | Numeric value. Zero or positive. | 4 |
Result for these sample inputs
5 units
- Formula
- c = √(a² + b²)
Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.
The method, explained
For a right triangle, c² = a² + b². Therefore c = √(a² + b²).
Legs of 3 and 4 units give a hypotenuse of 5 units.
What to keep in mind
Use the two sides meeting at the right angle and the same unit for each. This formula does not apply to arbitrary triangles.
Common questions
Which side is the hypotenuse?
It is opposite the right angle and is the longest side of a nondegenerate right triangle.
Can either leg be zero?
Zero gives a degenerate case. The arithmetic is defined, but the shape has no positive area.
Methodology maintained by ClarityKit. How these tools are built and checked.