In a parallelogram PQRS, if ∠p= 60°, then other three angles are
Opposite angles are equal and adjacent angles are supplementary in a parallelogram.
P = 60°
⇒ 
R = 60°
Q = ∠S = 1800- 60°
Q = ∠S = 1200
The three angles are 60°, 120°, 120°
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In a parallelogram PQRS, if ∠p= 60°, then other three angles are
Opposite angles are equal and adjacent angles are supplementary in a parallelogram.
P = 60°
⇒ R = 60°
Q = ∠S = 1800- 60°
Q = ∠S = 1200
The three angles are 60°, 120°, 120°