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Perpendicular to vector plane

  1. Mar 21, 2008 #1
    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?
     
  2. jcsd
  3. Mar 21, 2008 #2

    arildno

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    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.
     
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