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Math Help - Distance between point and line

  1. #1
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    Oct 2009
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    Distance between point and line

    Hi,
    I want to find the distance between a point and a line, but using projections. I get an answer of root(10) but I'm pretty sure that this is not the right answer.

    My point is
    P = (2,-1,-1)
    and the line is given by vector form
    L: (1,0,01) + t(1,2,1) , t E R

    I understand that w2 = \vec{v} - w1

    I think that I have a point Po=(1,0,-1) and that I can say that \vec{u}=(1,2,1) .... but I'm not sure at all about that.

    Anyone can help me ?
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  2. #2
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    Joined
    Oct 2009
    Posts
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    I'm trying to find my answer using the normal formula of the distance from a point to a line but I don't think it is working...
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