created: 06/03/98; revised: 10/09/98, 01/20/00, 02/18/02, 01/18/06
This chapter reinforces the topics introduced in the last
two chapters, and discusses
several new topics.
class is used as an example.
You have seen some of the material in this chapter before. But, don't rush through it. The purpose of this chapter is to review topics that you may still be somewhat unclear about.
In geometry, what is a two dimensional point?