Question 441306
We aren't told which side is the hypotenuse.
x^2+y^2=z^2
assuming that z is the missing side is the hypotenuse we get
x=12
y=18
z=21.63
but if 18 is the hypotnenuse
then the missing side is 13.42 

12 can't be the hypotenuse because the hypotenuse is the longest side