Lines have 2 dimensions length and width

By definition, a line is a single segment connected by two points. It has one dimension - length. A linestring is made by joining several lines. Each of the lines have a single dimension, however, because the joined lines can change direction, they now have a second dimension - length and width, much like a polygon.

-delilah

answer; i believe the correct answer is ( it gives the photographer greater control over the print)