43. In △ABC, the measure of ∠A is 30° and the measure of ∠B is 60° . If AB is 12 units long, what is the area, in square units, of △ABC ?

Answer and Explanation

Your Answer is

Correct Answer is B

Explanation

It can be known from the meaning of the question: ∠A=30°, ∠B=60°, and AB=12, so the side corresponding to ∠A is 6, and the side corresponding to ∠B is 6√3, so S=1 /2*(6*6√3)=18√3,