nfo :- ★ Supplementary angles are those angles whose sum is EQUAL to 90° ★ Complementary angles are those angles whose sum is equal to 90° ★ Examples of Supplementary angles are60° + 120° = 180° ★ Examples of complementary angles are 60° + 30° = 90° Now, Let's solve the question Solution (a) According to the question, We have to tell that Can be two acute angles be supplementary angles. ★ Acute angles are those angles whose measurement is LESS than 90° Let's take two examples of acute angles, One is 70° and Other one is 80° Let's add both the acute angles 70° + 80° = 150° 150° ≠ 180° Hence, The acute angles can't be supplementary .Solution (B) According to the question, We have to tell that , Can be two RIGHT angles be supplementary. ★ Right angles are those angles whose measurement is equal to 90° not more than it or not less than it. Let's take two examples of Right angle , One = 90° , Other = 90° Let's add both the angles 90° + 90° = 180° 180° = 180° Hence, The two right angles be supplementary