what is a line i
If you draw a line with a pencil, examination with a microscope would show that the pencil mark has a measurable width. The pencil line is just a way to illustrate the idea on paper. In geometry however, a line has no width. A straight line is the shortest distance between any two points on a plane. Drawing a line You can draw a line that just goes off the edges of the page, as in the figure above. More commonly it is shown as a line with an arrow head on each end as shown below. The arrow heads mean that the line goes off to infinity in both directions. Lines are commonly named in two ways: By any two points on the line.