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: Symetric lines

  1. Mar 29, 2008 #1
    1. The problem statement, all variables and given/known data

    The equations of the symmetric lines of two inner angles of triangle ABC are given:

    x+4=0 and 4x+7y+5=0, and the equation of the line of one of the sides of the triangle is

    given 3x+4y=0 (which goes through the points of the side where the symmetric lines are

    going). Find the equations of the lines which are going among the other two sides of the

    triangle.

    2. Relevant equations


    [tex]d=\frac{|Ax + By + C|}{|\sqrt{A^2+B^2}|}[/tex]


    3. The attempt at a solution

    I found one of the dots A(-4,3). Also I find that the lines are going through the point (0,0)
     
  2. jcsd
  3. Mar 29, 2008 #2

    HallsofIvy

    User Avatar
    Science Advisor

    By "symmetric line" of an angle, do you mean the angle's bisector?
     
  4. Mar 29, 2008 #3
    yes, sorry for mistranslation.
     
  5. Mar 29, 2008 #4
    anybody know?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook