SSC CGL Tier II 12 Apr 2015 Paper

(2) The opposite angles of a parallelogram are equal.
2x + 7x + 2x + 7x = 360°
⇒ 18x = 360°
⇒ x = 20°∴ One angle = 2x = 2 × 20 = 40°
Second angle = 7x = 7 × 20 = 140°
∴ 140 + 40° = 180°