Results 1 to 3 of 3

Math Help - Angle bisectors

  1. #1
    Senior Member
    Joined
    Oct 2009
    Posts
    447

    Angle bisectors

    I have attached a scan of a desription of an angle bisectors equation and an example. It is missing some information. There are 2 equations obtained presumably the interior angle bisector and the exterior angle bisector. Which is which? I have plotted all 4 lines and I can't make any sense of it.
    Attached Thumbnails Attached Thumbnails Angle bisectors-scan-1.jpg  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    earboth's Avatar
    Joined
    Jan 2006
    From
    Germany
    Posts
    5,806
    Thanks
    116
    Quote Originally Posted by Stuck Man View Post
    I have attached a scan of a desription of an angle bisectors equation and an example. It is missing some information. There are 2 equations obtained presumably the interior angle bisector and the exterior angle bisector. Which is which? I have plotted all 4 lines and I can't make any sense of it.
    1. The given formula uses the definition of an angle bisector as the set of all points which have the same perpendicular distance to two intersecting straight lines.

    2. All your calculations are OK.

    3. I've used your results to draw the 4 lines: The 2 lines drawn in black, the angle bisectors in red and light-blue. They (the bisectors!) must be pperpendicular to each other.
    Attached Thumbnails Attached Thumbnails Angle bisectors-zweiwinklhalb.png  
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member
    Joined
    Oct 2009
    Posts
    447
    The interior angle bisector is obtained by subtracting then it seems. I had some trouble displaying the graph with my program because the range made it look odd. Thats ok now. Thanks for the help.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Problem in Angle Bisectors
    Posted in the Geometry Forum
    Replies: 3
    Last Post: September 14th 2011, 08:51 PM
  2. 3 angle bisectors
    Posted in the Geometry Forum
    Replies: 1
    Last Post: April 27th 2011, 07:03 AM
  3. Quadrilateral From Angle Bisectors
    Posted in the Geometry Forum
    Replies: 4
    Last Post: March 3rd 2008, 05:26 PM
  4. Circles and Angle Bisectors again help plsss...
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: January 12th 2007, 03:53 PM
  5. Circles and angle bisectors
    Posted in the Pre-Calculus Forum
    Replies: 6
    Last Post: December 26th 2006, 11:20 PM

Search Tags


/mathhelpforum @mathhelpforum