Let's consider the information at hand:
- the triangle is a 45-45-90 triangle
⇒ has some special property about its side length
⇒ look at the diagram I attached
Using the same ratios of side length as seen in the diagram:
⇒ we get the equation:
![(1)/((√(2) )/(2) ) =(x)/(3√(2) ) \\(√(2) )/(2)*x=3√(2) \\(x)/(2)=3\\ x=3*2\\x=6](https://img.qammunity.org/2023/formulas/mathematics/high-school/lt6ap8k8ik2igeijq5sp7v6oeie79ukw1r.png)
Thus x = 6.
Answer: x = 6
Hope that helps!