We know thatOpposite sides of a parallelogram are equal ∴ 3x - 2 = 50 - x⇒ 3x + x = 50 + 2⇒ 4x = 52⇒ x = 13°∴(3x - 2)° = (3 × 13 - 2) = 37°(50 - x)° = (50 -13°) = 37°Adjacent angles of a parallelogram are supplementary∴ x + 37 = 180°∴ x = 180° - 37° = 143°Hence, four angles are : 37°,143°, 37°,143°