View Full Version : Need help with linear algebra


ColonelKlink1701
02-28-05, 10:12 PM
Hi. I was wondering how you find the distance between a plane (spanned by 2 sets of points) and a third point outside the set. Can somone please help me, I am someone confused, because this is not in my linear algebra book, or if it is im having trouble identifying it.

Thx.

everneo
03-01-05, 02:03 AM
Hi. I was wondering how you find the distance between a plane (spanned by 2 sets of points) and a third point outside the set. Can somone please help me, I am someone confused, because this is not in my linear algebra book, or if it is im having trouble identifying it.

Thx.

Formula # (24) in this page (http://mathworld.wolfram.com/Plane.html) would help.

shmoe
03-01-05, 02:15 AM
Now that you see the equation ColonelKlink1701, do you think you can derive it? There are a few different ways of doing it, if you'd like some hints just ask.

ColonelKlink1701
03-01-05, 06:48 PM
I think i get it. That equation is the normalized vector right? (divided by its lengt so that its equal to 1)?

PhysMachine
03-01-05, 07:13 PM
You just find the vector normal to the plane and dot it with the vector of interest.