Introduction

This distance is called the **diameter** of the points.
For any two points *x* and *y* we will use *d* (*x*, *y*)
to denote the distance between *x* and *y*.
By distance we mean **Euclidean distance**,
the staight-line distance between two points on a two-dimensional plane.
We could also consider higher dimensions and other distance metrics
(see, e.g. [8]).

Matthew Suderman

Cmpt 308-507