Perimeter of parallelogram

The perimeter of a parallelogram is the sum of the lengths of all its sides.

If the length of one side is "a" and the length of the adjacent side is "b", then the perimeter is:

P = 2a + 2b

Alternatively, if the lengths of all four sides are known, the perimeter would be:

P = a + b + c + d

where a, b, c, and d are the lengths of the four sides.