Results 1 to 2 of 2

Thread: Proving lines are perpendicular

  1. October 13th 2010, 08:17 PM #1
    GLAMX
    GLAMX is offline
    Newbie
    Joined
    Aug 2010
    Posts
    6

    Proving lines are perpendicular

    Please tell me how to solve this problem. I would really appreciate it.

    P1: 2y-x=2
    P2 y+2x=4

    How would you prove that they are perpendicular?
    Follow Math Help Forum on Facebook and Google+
  2. October 13th 2010, 08:31 PM #2
    Educated
    Educated is offline
    Senior Member Educated's Avatar
    Joined
    Aug 2010
    From
    New Zealand
    Posts
    392
    Thanks
    10
    Hint: When you multiply the gradients of 2 perpendicular lines, the it comes to -1.
    Follow Math Help Forum on Facebook and Google+
« includes circle,chord and tangent concepts | Pythagoras Puzzle »

Similar Math Help Forum Discussions

  1. proving a common perpendicular intersects the two skew lines
    Posted in the Advanced Algebra Forum
    Replies: 0
    Last Post: April 3rd 2009, 10:40 PM
  2. Help with Perpendicular Lines
    Posted in the Algebra Forum
    Replies: 1
    Last Post: February 13th 2009, 01:47 PM
  3. Perpendicular Lines
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: May 11th 2008, 07:53 PM
  4. Perpendicular lines
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: August 21st 2007, 04:28 AM
  5. perpendicular lines
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: November 10th 2006, 06:15 PM

Search Tags


/mathhelpforum @mathhelpforum