• # question_answer 19) Write down the measures of (a) some acute angles. (b) some obtuse angles, (give atleast two examples of each)

(a) We know that, the measure of an acute angle is always less than ${{90}^{o}}$. So, ${{45}^{o}},\,{{50}^{o}},\,{{55}^{o}},\,{{60}^{o}},\,{{65}^{o}}$ all are acute angles, (b) We know that the measure of an obtuse angle, is always, greater than ${{90}^{o}}$ but less than ${{180}^{o}}$. So, ${{120}^{o}},\,{{125}^{o}},\,{{135}^{o}},\,{{140}^{o}}$ all are obtuse angles.