Results 1 to 2 of 2

Math Help - Interior angle

  1. #1
    Newbie
    Joined
    Feb 2010
    Posts
    22

    Interior angle

    Find the velues of interior angle A of a triangle whose vertices are A(3,-2), B(-5,8) and C(4,5).

    Please help me and show the solution... Thanks!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,408
    Thanks
    1294
    Quote Originally Posted by lance View Post
    Find the velues of interior angle A of a triangle whose vertices are A(3,-2), B(-5,8) and C(4,5).

    Please help me and show the solution... Thanks!
    Use Pythagoras to find the length of all the sides, then use the Cosine Rule to find angle A.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Interior Angle Sum
    Posted in the Geometry Forum
    Replies: 1
    Last Post: September 26th 2010, 11:36 PM
  2. Closure, interior..
    Posted in the Differential Geometry Forum
    Replies: 3
    Last Post: April 30th 2010, 07:01 AM
  3. interior/ closure
    Posted in the Differential Geometry Forum
    Replies: 8
    Last Post: April 25th 2010, 01:54 PM
  4. interior of set closure differnet from interior of the same set?
    Posted in the Differential Geometry Forum
    Replies: 2
    Last Post: October 17th 2009, 11:13 AM
  5. Interior Angles
    Posted in the Geometry Forum
    Replies: 4
    Last Post: June 21st 2006, 05:20 AM

Search Tags


/mathhelpforum @mathhelpforum