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

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