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Homework Help: Vector problem

  1. Feb 10, 2010 #1
    The vertices of a triangle are A(4;2) ; B(11;6) ; C(-3;-1)
    What is the equation of the perpendicular bisector of side a?
    (i think -7x+14y=7)
    What is the equation of the altitude of side c?
    (i think -4x+7y=5)
    What is the intersection of the previous lines?
    i have no idea about this,please help,and also write down how you solved it
  2. jcsd
  3. Feb 10, 2010 #2
    Welcome to PH (=
    what is side a? AB? AC ? BC?
  4. Feb 10, 2010 #3


    Staff: Mentor

    Side a is usually the side across from angle A.

    How does one normally find the point of intersection of two lines?
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