Answer:
6[tex]\sqrt[]{2}[/tex]
Step-by-step explanation:
The base of the triangle is 6.
This is because if the 2 given angles are 90, and 45, then that means that last angle must also be 45 because if you add all the angles of a triangle, it adds to 180.
To solve for x, also known as c, we do [tex]a^{2}+b^{2} = c^{2}[/tex].
If, 36 + 36 = 72, Then x is the square root of 72, also known as D: 6[tex]\sqrt[]{2}[/tex]
(as shown in the picture below)
Hope that helps!
