**An angle is one-thirds of a straight line angle ; find : (i) the angle (ii) the complement and the supplement of the angle obtained above.**

###### Answers:

Straight angle = 180°

∴ Given angle = (1/3) × 180° = 60°

(i) Complement of the given angle

= 90° – 60° = 30°

(ii) Supplement of the given angle

= 180° – 60° = 120°