How to use the pythagorean theorem calculator
Find the hypotenuse or a missing side of a right triangle. Enter side a, side b in the fields above; the hypotenuse c, area, perimeter are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- a — Side a
- b — Side b
Worked example
With side a = 3, side b = 4, the calculator gives hypotenuse c ≈ 5; area ≈ 6; perimeter ≈ 12.
Frequently asked questions
What is the formula for the pythagorean theorem calculation?
Hypotenuse c = hypot(a,b). Area = a × b / 2. Perimeter = a+b+[Hypotenuse c]. Here a is side a, b is side b.
What inputs do I need for the pythagorean theorem calculator?
You need side a, side b. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.