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Math Help - Planes

  1. #1
    Mtl
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    Planes

    Ok, so i have a assignment where I'm supposed to descirbe planes in certain situation (ex. parralel to xz plane)

    So how would you describe (in terms of the xy, zy, and xz planes), Ax + By+ Cz + D= 0 whereas A= 0 and B,C,D do not = 0
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  2. #2
    Flow Master
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    Quote Originally Posted by Mtl View Post
    Ok, so i have a assignment where I'm supposed to descirbe planes in certain situation (ex. parralel to xz plane)

    So how would you describe (in terms of the xy, zy, and xz planes), Ax + By+ Cz + D= 0 whereas A= 0 and B,C,D do not = 0
    Work with me on this - are you familiar with vectors?
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  3. #3
    Mtl
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    pretty familiar i guess.
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  4. #4
    Flow Master
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    Quote Originally Posted by Mtl View Post
    pretty familiar i guess.
    Then you could describe the plane Ax + By + Cz + D = 0 as being such that the vector Ai + Bj + Ck is perpendicular to it. Furthemore, you could say that it's perpendicular distance from the origin is \frac{|D|}{\sqrt{A^2 + B^2 + C^2}}.
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