Is the answer to this a, b, c or d?

Answer:
D
Step-by-step explanation:
This is a 45 45 90 triangle
It is special because the sides are in a certain ratio of 1:1:[tex]\sqrt{2}[/tex]
[tex]\sqrt{2}[/tex] is the length of the hypotenuse and 1 is the length of the legs.
This means that the length of the legs are equal, so y=[tex]3\sqrt{2\\}[/tex]
If 1 part is [tex]3\sqrt{2\\}[/tex], we need to find what [tex]\sqrt{2}[/tex] is.
We can do that with [tex]3\sqrt{2\\}[/tex] *[tex]\sqrt{2}[/tex]
6
x=6