Points
A point is a way to describe a specific location in space. It is drawn
by placing a single dot at the location you want to specify, and denoted in text
with a capital letter. Below is pictured the point B.
Figure 1.1: The point B
A point has no length, or width. In real life it is not tangible; points are
useful for identifying specific locations, but are not objects in themselves.
They only appear so when drawn on a page.
