Results 1 to 2 of 2

Math Help - [SOLVED] determining a rectangle's aspect ratio

  1. #1
    Newbie
    Joined
    Mar 2009
    Posts
    4

    [SOLVED] determining a rectangle's aspect ratio

    NOTE: I reposted this in Advanced Geometry before realizing there was a "Go Advanced" button here for doing that. I'll leave this open here for now but I think it's a more difficult problem than I first thought...

    It's been too long since I've had to figure something like this out. I'm hoping someone will be kind enough to help. I'm attaching a picture of what I'm working on as it will make it easier to describe. (I'll leave the image up until someone's given me an answer).



    I'm looking for the width (line dc) of this rectangle when the height (line de) is 5 inches (and for the formula needed to figure it out). Note that the blue line (da) and red line (ac) are equal in length and that angle abc is 90 degrees. Also note that line ec is a diagonal of the rectangle from the lower left corner to the upper right corner and line af runs from the middle of line dc to the lower right corner (f).

    Just from experimenting a bit I know that line dc is about 7.1 inches. I'd like the formula for getting the exact length.

    Thank you in advance. I didn't think this would be that hard to figure out but I don't really know how to even approach solving it.
    Last edited by paul6; March 14th 2009 at 06:40 PM. Reason: to explain that it's been reposted to the advanced forum
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Newbie
    Joined
    Mar 2009
    Posts
    4
    solved here.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 1
    Last Post: February 2nd 2011, 08:54 PM
  2. Replies: 1
    Last Post: November 23rd 2009, 06:41 PM
  3. Replies: 3
    Last Post: March 14th 2009, 09:24 PM
  4. resize x maintain y aspect ratio
    Posted in the Algebra Forum
    Replies: 1
    Last Post: May 13th 2008, 10:05 AM
  5. Geometric Sequence, Determining common ratio.
    Posted in the Algebra Forum
    Replies: 1
    Last Post: September 19th 2007, 10:20 PM

Search Tags


/mathhelpforum @mathhelpforum