Question 168834
You add the squares of the 2 other sides, then take the sqrt.
For example:  the 2 short sides are 5 and 12
c (hypotenuse) = sqrt(5*5 + 12*12)
= sqrt(25 + 144)
= sqrt(169)
= 13
it's {{{c^2 = a^2 + b^2}}}