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Which of the points is closer to the plane - is this right?

  1. Sep 24, 2009 #1
    I have two points, P(0,0,0) and Q(-1,-2,0)

    and a plane x + 7y - 15z = 30

    May I simply:

    [tex]\sqrt{(1-0)^{2} + (7-0)^{2} + (-15-0)^{2}}[/tex]

    [tex]\sqrt{(1+1)^{2} + (7+2)^{2} + (15-0)^{2}}[/tex]

    and the one with the lesser magnitude is closer?
     
  2. jcsd
  3. Sep 24, 2009 #2
    Nevermind.
     
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