In a 30-60-90 right triangle, the side opposite the 30 degree angle is 1/2 the hypotenuse, and the side opposite the 60 degree angle is (1/2) sqrt(3) times the length of the hypotenuse
so, one of the angles will be 180-30 = 150
Yep, I confused the lenghts. 150 or 30 here. Would have been nice to see the answer choices upfront.