Beginner Question

*To*: mathgroup at smc.vnet.net*Subject*: [mg66561] Beginner Question*From*: akil <akil39 at gmail.com>*Date*: Sat, 20 May 2006 04:47:06 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hi, Suppose I have three 2D points A, B, C. And two points, namely A and B form a line. How can I determine in mathematica on which side, (so which half-plane formed by) of the line, point C is. So when I input three points I want to know if the third point is on the left or right side of the half plane formed by the line (ray) A,B. Appreciate any help.

**Follow-Ups**:**Re: Beginner Question***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>