Question

I cannot understand how to take out perimeter of parallelogram..??

Answer 1

Like any polygon, the perimeter is the total distance around the outside, which can be found by adding together the length of each side. In the case of a parallelogram, each pair of opposite sides is the same length, so the perimeter is twice the base plus twice the side length. Or as a formula:
perimeter = 2(w+h)where:
w is the base length of the parallelogram
h is the side length