question_answer

Which one of the following angles should be added to \[\mathbf{3}{{\mathbf{0}}^{{}^\circ }}\] such that the sum becomes a straight angle?

A) \[{{90}^{{}^\circ }}\]                        

B) \[{{100}^{{}^\circ }}\]         

C) \[{{120}^{{}^\circ }}\]                       

D) \[{{150}^{{}^\circ }}\]

E) None of these