Results 1 to 6 of 6

Math Help - Draw Perpendicular Line

  1. #1
    Newbie
    Joined
    Aug 2008
    Posts
    8

    Smile Draw Perpendicular Line

    Hi all.

    Looking for help from you experts to draw a line perpendicular to the existing line at 90 degree.

    (Line to be drawn)
    |
    |
    |
    |
    -----------------------------( Given Line )

    I hope that I can hear from you soon . Please note that the logic has to work with lines of different slopes. Angle is measured in Degrees.

    Regards
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Lord of certain Rings
    Isomorphism's Avatar
    Joined
    Dec 2007
    From
    IISc, Bangalore
    Posts
    1,465
    Thanks
    6
    Quote Originally Posted by arunkish View Post
    Hi all.

    Looking for help from you experts to draw a line perpendicular to the existing line at 90 degree.

    (Line to be drawn)
    |
    |
    |
    |
    -----------------------------( Given Line )

    I hope that I can hear from you soon . Please note that the logic has to work with lines of different slopes. Angle is measured in Degrees.

    Regards
    Well you have to be more precise. What are we allowed to use? Compasses? Protractors?

    Protractors are used mainly to draw lines at angles.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor kalagota's Avatar
    Joined
    Oct 2007
    From
    Taguig City, Philippines
    Posts
    1,026
    what are the tools needed for drawing?
    if you only need compass, ruler and pencil/pen, then here are the steps.

    1. using the compass, draw two arcs of the same radii such that the centers lie on the given line and the arcs intersect the line.
    2. be sure the arcs intersects each other at two points.
    3. connect the points of intersection of the arcs by a straight line (this line passes the given line and is perpendicular to it.)
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Aug 2008
    Posts
    8
    Coooooooooool, LOL . Sorry. But it was my mistake. To be more precise I'm writing a program in Visual Basic and I need some perpendicular lines to be created. Hope it's clear now....

    Regards
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Super Member wingless's Avatar
    Joined
    Dec 2007
    From
    Istanbul
    Posts
    585
    Quote Originally Posted by arunkish View Post
    Coooooooooool, LOL . Sorry. But it was my mistake. To be more precise I'm writing a program in Visual Basic and I need some perpendicular lines to be created. Hope it's clear now....

    Regards
    Let m be the slope of your line. Then the slope of the perpendicular line is -1/m.
    Follow Math Help Forum on Facebook and Google+

  6. #6
    MHF Contributor
    Joined
    Aug 2007
    From
    USA
    Posts
    3,110
    Thanks
    2
    Your given line must have an equation. (y = mx+b)
    This equation has a determinable "Slope" (m)
    You need the given point (r,s) on the line.
    Your new equation is (y-s) = (-1/m)(x-r)

    Good luck with that when m = 0. <== You tell me the solution when this is the case.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 3
    Last Post: February 9th 2010, 06:45 AM
  2. calculate line integral and draw curve C
    Posted in the Calculus Forum
    Replies: 4
    Last Post: December 8th 2009, 01:00 PM
  3. Draw a number line
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 12th 2009, 11:36 AM
  4. Triangles- Can you draw a line that intersects
    Posted in the Geometry Forum
    Replies: 1
    Last Post: September 1st 2008, 01:45 PM
  5. How do you draw a line of best fit?
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: August 27th 2008, 05:05 AM

Search Tags


/mathhelpforum @mathhelpforum