One angle of a parallelogram is twice the adjacent angle. Angles of the parallelogram are
60°,120°,60°,120°
Let one angle be x and the adjacent angle be y.
Given, x = 2y--- (i)
x + y = 180∘---- (ii) (sum of adjacent angles of a parallelogram is 180∘)
Substitute (i) in (ii), we get
⇒ y = 60∘
⇒ x = 2y
⇒ x = 120∘
Therefore, the angles of the parallelogram are 60∘, 120∘, 60∘, 120∘