Answer:
11sqrt(2)
Explanation:
This is an isosceles right triangle so x=y.
By Pythagorean Theorem, x^2+x^2=22^2.
2x^2=22^2 after combining like terms
x^2=22^2 /2 after dividing 2 on both sides
x=sqrt(22^2 /2) after taking square root of both sides
x=22/sqrt(2)
x=22/sqrt(2) sqrt(2)/sqrt(2)
x=22sqrt(2)/2
x=11sqrt(2)