Results 1 to 4 of 4

Math Help - co ordinate geometry

  1. #1
    Newbie
    Joined
    Nov 2008
    Posts
    12

    co ordinate geometry

    can anyone help??
    got this question,,
    The points ABC have co ordinates (2, 1) (b,3) and (5,5) where b>3
    and angle ABC=90degrees ??
    I know the answer just have no idea how to work it out.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,862
    Thanks
    626
    (slope of AB)(slope of BC) = -1
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,786
    Thanks
    1683
    Awards
    1
    In a right triangle a^2 + b^2 = c^2.
    So (b-2)^2 +(3-1)^2 + (b-5)^2 + (3-5)^2 = (5-2)^2 + (5-1)^2
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Nov 2008
    Posts
    12
    does that make b= 6
    cause i justtried and got some strange answer sorry i'm a bit rubbish at this
    Quote Originally Posted by Plato View Post
    In a right triangle a^2 + b^2 = c^2.
    So (b-2)^2 +(3-1)^2 + (b-5)^2 + (3-5)^2 = (5-2)^2 + (5-1)^2
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Co-ordinate geometry!
    Posted in the Geometry Forum
    Replies: 4
    Last Post: March 19th 2011, 06:18 AM
  2. co-ordinate geometry
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: September 26th 2008, 12:52 PM
  3. Co-ordinate Geometry Help Please
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: July 18th 2008, 04:39 PM
  4. Co-ordinate geometry help
    Posted in the Pre-Calculus Forum
    Replies: 8
    Last Post: October 3rd 2007, 09:37 PM
  5. co-ordinate geometry
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: November 23rd 2006, 07:08 AM

Search Tags


/mathhelpforum @mathhelpforum