Mathematics is the queen of the sciences.C. F. Gauss

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Pythagorean theorem

Find a missing side and all main properties of a right triangle.

6

Enter known values

Fill in the fields below — the result will appear alongside.

Live diagram of the known values
abc
Value a
b
ft
c
ft

Formulas

c=a2+b2c=\sqrt{a^2+b^2}

How it works

Choose the unknown side and enter the other two. The calculator validates the hypotenuse and returns area, perimeter and angles.

The missing side follows from a² + b² = c²; trigonometry supplies the acute angles.

Examples

3–4–5 triangle{"a":3,"b":4,"unknown":"c"}

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Calculate a circle from its radius, diameter or circumference.

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