Pythagorean Theorem Calculator

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The Pythagorean Theorem is used for calculating the hypotenuse length of a right triangle.
A right triangle with sides 6 and 8 will have a hypotenuse length of 10 because:

Hypotenuse = Square Root Of ( 6² + 8²)
Hypotenuse = Square Root Of ( 36 + 64)
Hypotenuse = Square Root Of ( 100)
Hypotenuse = 10

EXAMPLE:
One side of a right triangle measures 5 and the hypotenuse equals 13.
What is the length of the other side?
Side 2 = Square Root of (13 ² - 5 ²)
Side 2 = Square Root of (169 - 25)
Side 2 = Square Root of (144)
Side 2 = 12
As an added bonus, all 3 angles and the triangle area will automatically be calculated.

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Click here to see a proof of the Pythagorean Theorem


Significant Figures >>>
Numbers are displayed in scientific notation with the amount of significant figures you specify. For easier readability, numbers between .001 and 1,000 will not be in scientific notation but will still have the same precision.
You may change the number of significant figures displayed by changing the number in the box above.
Most browsers, will display the answers properly but if you are seeing no answers at all, enter a zero in the box above, which will eliminate all formatting but at least you will see the answers.


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