Question

What is the perimeter of a parallelogram measuring 5 ft. x 9 ft.?

Answer 1

Opposite sides of a parallelogram are equal in length so 
the perimeter = 2*9 + 2*5 = 28 ft Answer

Answer 2

So.... In a paralleogram, both opposite sides are equal.
P=5+5+9+9
P=28 ft