• # question_answer 18) Say true or false. (a) The measure of an acute angle $<{{90}^{o}}$. (b) The measure of an obtuse angle $<{{90}^{o}}$. (c) The measure of a reflex angle $>{{180}^{o}}$. (d) The measure of one complete revolution $={{360}^{o}}$. (e) If $m\angle A={{53}^{o}}$ and $m\angle B={{35}^{o}},$then $m\angle A>m\angle B.$

(a) True, because the measure of an acute angle is always less than ${{90}^{o}}$. (b) False, because the measure of an obtuse angle is always greater than ${{90}^{o}}$. (c) True, because the measure of a reflex angle is always greater than ${{180}^{o}}$ and less than ${{360}^{o}}$. (d) True, because the measure of one complete revolution is equal to ${{360}^{o}}$. (e) True, because the measure of angle A is greater than angle B.