What is the length of a hypotenuse when the legs are 5 and 12

By using pythagoras theorem where

(Base) ^2 + (perpedicular) ^2 = (hypotenuse) ^2

So,

(5) ^2 + (12) ^2 = (hypotenuse) ^2

25 + 144 = (hypotenuse) ^2

169 = (hypotenuse) ^2

13 = hypotenuse

So, hypotenuse = 13