Construct a parallelogram PQRS in which QR = 4.7 cm, ∠Q = 120° and PQ = 2.8 cm.

Steps of construction :

1. Draw QR = 4.7 cm.

2. Construct ∠RQX = 120°.

3. With Q as centre and radius = 2.8 cm, draw an arc,cutting QX at P.

4. With P as centre and radius = 4.7 cm, draw an arc.

5. With R as centre and radius = 2.8 cm, draw another arc, cutting the previous arc at S.

6. Join RS and PS.

Hence, PQRS is the required parallelogram.