Square
Maths
How to calculate missing right triangle side
This tool calculates missing right triangle side from Hypotenuse, Known short side. Enter each quantity in its labelled field, then use the formula below to check the calculation.
Formula
√(hypotenuse² − side²)
Worked example
- Hypotenuse
- 5
- Known short side
- 3
Applying the formula to these values gives 4 .
What should I check?
Calculate powers, roots, logarithms, ratios, slopes and trigonometric functions. Trigonometric angles are entered in degrees.
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