Results 1 to 3 of 3

Math Help - Advanced proof of parallelograms having equal areas

  1. #1
    Member
    Joined
    Jul 2010
    Posts
    85

    Advanced proof of parallelograms having equal areas

    SOLUTION FOUND. You can extend EF and CB until they intersect.
    Last edited by lamp23; March 30th 2012 at 01:21 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Apr 2005
    Posts
    16,400
    Thanks
    1849

    Re: Advanced proof of parallelograms having equal areas

    If all you are given is that ABCD and DEFG are parallelograms then you can't prove they have the same area- it's not true! It is not true that all parallelograms have the same area. What properties of ABCD and DEFG are you given that you haven't mentioned?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    Joined
    Oct 2009
    Posts
    5,561
    Thanks
    785

    Re: Advanced proof of parallelograms having equal areas

    Quote Originally Posted by HallsofIvy View Post
    What properties of ABCD and DEFG are you given that you haven't mentioned?
    Well, the picture shows obviously that A\in EF and G\in CB.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Equal Areas of triangles and quadrilateral
    Posted in the Geometry Forum
    Replies: 1
    Last Post: April 8th 2011, 04:12 AM
  2. Replies: 5
    Last Post: February 24th 2011, 05:08 PM
  3. Advanced Calculus - Limit Proof
    Posted in the Calculus Forum
    Replies: 4
    Last Post: February 22nd 2010, 12:30 AM
  4. advanced vector geometry proof
    Posted in the Advanced Math Topics Forum
    Replies: 4
    Last Post: January 24th 2010, 08:41 AM
  5. Equal Areas
    Posted in the Calculus Forum
    Replies: 6
    Last Post: July 30th 2009, 11:29 PM

Search Tags


/mathhelpforum @mathhelpforum