let w = 61° in a parallelogram WXYZ
angle Y + angle W = 180° ( since sum of adjacent angle is 180°)
angle Y + 61° = 180°
angle Y = 180° - 61° = 119°
angle Z ≈ angle W = 61° ( opposite angle of a parallelogram )
angle X = angle Y = 119° (opposite angle of a parallelogram )
hence other angle of a parallelogram are 61°, 119°and 119°
