• # question_answer The measure of $\angle C$ is: A) $30{}^\circ$ B) $45{}^\circ$ C) $60{}^\circ$ D) None of these

 Similarly, $\tan C=\frac{AB}{BC}=\frac{9}{3\sqrt{3}}=\sqrt{3}$ $\Rightarrow \,\,\,\,\,\,\,\,\,\tan C=\tan 60{}^\circ \,\,\,\,\,\Rightarrow \,\,\,\,\,\angle C=60{}^\circ$              .(2) So, option [c] is correct.