Finding the Normal to a Plane Using Vector Geometry

[bobmoin]

Hi all,

Am trying to teach myself vector geometry but don't quite understand certain things.

If you are know three points on a plane, how do you find the normal to the plane?

 

[arildno]

Hi all,

Am trying to teach myself vector geometry but don't quite understand certain things.

If you are know three points on a plane, how do you find the normal to the plane?

Fix one of your points, and then find the two vectors going from that point to one of the other points.

Then, the normal is found by taking the cross-product of those two vectors.