Answer:
Since they're asking you to find the missing sides "y" and "x" here's what you need to do....
Explanation:
1) This is the 45-45-90 Triangle.
2) y = 20 becasue this is an isocelese triangle - meaning a triangle that has 2 sides of equal lengths!
3) in order to find x (which is the hyptoneus) you have to do
* leg (use on of the legs)
=
also I think 45 degrees is there just to throw you off. And I'm pretty positive this is the correct answer, and i'm 100% sure that y = 20 is correct!