Results 1 to 5 of 5

Math Help - Interior angles of special type of irregular polygon?

  1. #1
    Newbie
    Joined
    Nov 2012
    From
    USA
    Posts
    2

    Interior angles of special type of irregular polygon?

    Hope someone can help, I can't find anything online.
    I need to know if there's a way to find the interior angles of an irregular convex polygon, all of whose sides but one have the same length and the same angle between them, when you know only the lengths of all sides. Or a series of equations specific to the number of sides would work as well.
    Thanks in advance.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Sep 2012
    From
    Australia
    Posts
    3,879
    Thanks
    697

    Re: Interior angles of special type of irregular polygon?

    Hey arach44.

    Try forming a perfect polygon by extending the un-equal side as if it were equal and then use some trigonometry to get the missing angle.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Nov 2012
    From
    USA
    Posts
    2

    Re: Interior angles of special type of irregular polygon?

    Thanks, chiro. But I think that would change the angle or lengths of the two sides flanking the variable side.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Joined
    Sep 2012
    From
    Australia
    Posts
    3,879
    Thanks
    697

    Re: Interior angles of special type of irregular polygon?

    You might want to divide the polygon into triangles and again use trig properties to get the angles (most of the stuff in geometry uses these sorts of decompositions for your problems with polygons).
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Nov 2012
    From
    USA
    Posts
    10

    Re: Interior angles of special type of irregular polygon?

    How do you find an interior angle in an irregular polygon?





    exede satellite internet
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Gaussian-type quadrature with interior fixed nodes
    Posted in the Advanced Applied Math Forum
    Replies: 0
    Last Post: July 12th 2010, 01:54 PM
  2. Measuring the boundary of an irregular polygon
    Posted in the Geometry Forum
    Replies: 7
    Last Post: April 13th 2009, 05:36 AM
  3. irregular polygon
    Posted in the Geometry Forum
    Replies: 5
    Last Post: July 16th 2008, 10:31 PM
  4. A special type of function...
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: December 18th 2006, 04:06 AM
  5. Centroid of a irregular polygon???????
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: February 20th 2006, 11:34 AM

Search Tags


/mathhelpforum @mathhelpforum