Need help on math

Question

RECTANGLES The formula P = 2l + 2w represents the perimeter of a rectangle. In this formula,

l is the length of the rectangle and w is the width.

Answer 1

l or L usually represents length as the longer side,

with W as the shorter side

If L=W then the rectangle is a square and the perimeter P=4L or 4W

sometimes the formula is P=2(L+W), factoring out the 2 from 2L+2W