Ok new question this time I promise

Angle C  = 60°

And the side opposite this  is  √3  times as long as the side opposite the 30° angle

So AB  =  6√3

So......the area is

(1/2) height * base

(1/2) AC * AB  =

(1/2) * 6 * 6√3  =

18√3  units^2