Perimeter of a parallelogram Definition: The total distance
around the outside of a parallelogram Try this Drag any orange
dot to resize the parallelogram. The perimeter is calculated as
you drag. Drag point D to change the base length.  How to find
the perimeter of a parallelogram  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  In the figure above,
drag any orange dot to resize the parallelogram. From the side
lengths shown, calculate the perimeter and verify your result
matches the formula at the top of the diagram.  Related polygon
topics   Types of polygon  Area of various polygon types
Perimeter of various polygon types  Angles associated with
polygons  Named polygons