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 February 12th, 2018, 10:47 PM #1 Newbie   Joined: Feb 2018 From: Afghanistan Posts: 17 Thanks: 0 Parallelogram ABCD is a parallelogram and A(-b,-a) ,B(a,-3 ),C(5,a), D(-2,a) are given find the ratio of a/b Please do step by step
 February 12th, 2018, 11:16 PM #2 Senior Member   Joined: Feb 2016 From: Australia Posts: 1,741 Thanks: 609 Math Focus: Yet to find out. Can you post your working? Last edited by skipjack; February 13th, 2018 at 12:30 AM.
 February 13th, 2018, 12:30 AM #3 Global Moderator   Joined: Dec 2006 Posts: 19,989 Thanks: 1855 AC has mid-point (5/2 - b/2, 0) and BD has mid-point (a/2 - 1, a/2 - 3/2). As a parallelogram's diagonals bisect each other, these points must be the same. What does that imply about the values of a and b? Thanks from Marva

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