Question

I need some help.

Answer 1

@Hero some help?

Answer 2

There are several ways to tackle this problem, but since this is a multiple choice question, I'd say you pick an option, say B, and see if that measurement makes sense for both triangles:\[12^2+(6\sqrt5)^2=18^2\]\[15^2+(6\sqrt5)^2\approx20.12^2\]\[20.12^2+18^2=27^2\]It appears that B is your solution.

Answer 3

Thank you!