Question

PQRS is a parallelogram If PQ 12cm, QR 8 cm and AR 9 cm, find the area of ​​parallelogram ABCDand the length of RB.

Answer 1

Area of a parallelogram=b×h
=12×9=108
since parallelogram is same
BR ×8=108
BR=108/8=13.5

Answer 2

area of parallelogram is base × height
so area=PQ×AR=PS×RB
12×9=8×RB
RB=13.5 cm
area = 108 square units

hope it helps