1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Change format of equation of plane

  1. Oct 18, 2006 #1
    Hi all, I have a plane defined like this:

    x = 2 +t
    y = 2+t
    z = t

    How do I put it in the format:
    Ax + By + Cz = D?

    I feel stupid! :confused:
  2. jcsd
  3. Oct 18, 2006 #2
    So it is the line through (2,2,0) and parallel to the vector v = (1,1,1)
    Last edited: Oct 18, 2006
  4. Oct 18, 2006 #3
    Why is it not parallel to the vector v = (1,1,1)?
  5. Oct 18, 2006 #4


    User Avatar
    Homework Helper

    You may want to investigate this: http://mathworld.wolfram.com/Plane.html" [Broken].
    Last edited by a moderator: May 2, 2017
  6. Oct 18, 2006 #5


    User Avatar
    Science Advisor

    Well, feel only a little bit stupid!:rolleyes: That's not the equation of a plane! Since x, y, z depend on a single parameter, t, it is the equation of a one-dimensional figure. Since the functions are linear, it is the equation of a line, not a plane.
  7. Oct 18, 2006 #6
    Ah ok, thanks for all the help!
  8. Oct 18, 2006 #7
    Guess what? Turns out it was a textbook orthographical error. It was supposed to be "line" not "plane." And I was stumped for so long!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook