Results 1 to 5 of 5

Math Help - solving triangles this time i will show what to find.

  1. #1
    Banned
    Joined
    Jul 2008
    Posts
    19

    solving triangles this time i will show what to find.

    1)triangleABC:angleA=155degrees,b=2,c=7
    find angleB, angleC,and side a

    i hope this explains enough if not tell me i have more questions but i need to know if you understand me.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member Jonboy's Avatar
    Joined
    May 2007
    From
    South Point
    Posts
    193
    Always gotta have a picture.



    Use the Law of Cosines. Start with:

    a^2 = b^2 + c^2 - 2bc Cos A

    Plug in what we have: a^2 = 2^2 + 7^2 - 2(2)(7) Cos 155

    Find an approximate answer. Round as necessary.

    From there you could use the Law of Sines twice for the other two angles.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Banned
    Joined
    Jul 2008
    Posts
    19
    do i determine the C or the B first
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Member Jonboy's Avatar
    Joined
    May 2007
    From
    South Point
    Posts
    193
    it doesn't matter.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Banned
    Joined
    Jul 2008
    Posts
    19
    i finished all my solving triangles now im on problem solving with triangles. so if you want to go ahead and show me how to do those be my guest.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Solving Triangles to Find Position
    Posted in the Geometry Forum
    Replies: 1
    Last Post: September 13th 2010, 06:00 PM
  2. solving triangles
    Posted in the Algebra Forum
    Replies: 7
    Last Post: October 10th 2009, 05:36 PM
  3. show time travelled with uniform speed
    Posted in the Advanced Applied Math Forum
    Replies: 1
    Last Post: November 18th 2008, 04:18 PM
  4. Solving triangles
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: July 18th 2008, 10:18 AM
  5. solving rt triangles
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: December 4th 2006, 10:23 AM

Search Tags


/mathhelpforum @mathhelpforum