Question

Two adjacent sides of a parallelogram are 5cm and 6cm respectively find its perimeter

Answer 1

P=2(a+b)=2·(6+5)=22cm

Answer 2

as we know that opp. sides of a //gm are equal
then we get 
sides of a //gm is 5,6,5,6
perimeter of a //gm is sum of all sides
=5+6+5+6=22