Solution:-
Steps of construction:
1. Draw a line segment .
2. At Q, draw a ray making an angle of with QR
3. Along a ray, set off .
4. With P as a center and radius , draw an arc.
5. With R as a center and radius , draw another arc, cutting the previous arc at S.
6. Join PS and RS.
Then, PQRS is the required parallelogram.
7. So, QS and PR intersect each other at O.
Therefore, there is no line of symmetry in parallelogram PQRS.