What is the value of x in the diagram below?

Answer:
option C is the correct option.
Solution,
Triangle are similar by AA.
[tex] \frac{12}{2} = \frac{54}{x} \\ or \: 12x = 108(cross \: multiplication) \\ or \: x = \frac{108}{12} \\ x = 9[/tex]
hope this helps...
Good luck on your assignment..