Question

ABCD is a parallelogram the perimeter is 144 cm and BC = 20 CM then find a b​

Answer 1

ABCD is a parallelogram
Perimeter = 2(AB+BC)
144=2(AB+20)
144/2=AB+20
72-20=AB
52=AB
AB=52cm

Answer 2

since perimeter is 144 by substituting value of bc and ad as 20 CM we ab=52cm