A parallelogram has sides of length 18.5 inches and 10.3 inches. What is the perimeter?

57.6

Step-by-step explanation:

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