Program:	Area
Author:	Rob Gaebler
Date:		2/16/99

	This program finds the area of ANY polygon.  The polygon can be convex or concave, and can have up to 999 sides (as if you'll ever have one of those).  When you enter the vertices, you can enter them in either clockwise or counterclockwise order, starting with any vertex.  With a triangle, you can enter the vertices in any order whatsoever.