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What is the length of the hypotenuse of a right triangle if the two other sides are of lengths 15 and 13?

1 Answer

Jan 13, 2016

$c = sqrt(394) ~~ 19.85$

Explanation:

You can use the Pythagorean Theorem.

In your case, the two sides (that are not the hypotenuse) are $a = 15$ and $b = 13$ . Your hypotenuse $c$ is unknown.

The Pythagorean Therem states:

$a^2 + b^2 = c^2$

Thus, in your case, you have

$15^2 + 13^2 = c^2$

$225 + 169 = c^2$

$394 = c^2$

$c = sqrt(394) ~~ 19.85$

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