Results 1 to 2 of 2

Math Help - Finding a normal to a plane?

  1. #1
    Member
    Joined
    Jan 2008
    Posts
    175

    Finding a normal to a plane?

    how can I do this in 3 space with for example points like this: for p1 = (3,0,3) p2 = (1,0,1) p3 = (1,2,3) I know N must be orthogonal to each point p2p1, p3p2, and p1p3.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Apr 2008
    Posts
    1,092
    The vectors defined by (p1, p2), (p1, p3) and (p2, p3) are all in the plane defined by p1, p2, and p3. Let us call these vectors A, B, and C. The cross-product of any two of A, B, and C will be normal to the plane.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: May 14th 2011, 06:05 PM
  2. Normal Plane help
    Posted in the Calculus Forum
    Replies: 7
    Last Post: June 5th 2010, 01:20 PM
  3. Normal to Plane
    Posted in the Algebra Forum
    Replies: 1
    Last Post: February 10th 2010, 05:50 PM
  4. normal plane to the curve intersecting a plane
    Posted in the Calculus Forum
    Replies: 2
    Last Post: October 23rd 2009, 09:53 AM
  5. Normal To Plane
    Posted in the Calculus Forum
    Replies: 7
    Last Post: June 19th 2008, 05:51 AM

Search Tags


/mathhelpforum @mathhelpforum