dferm Master | Next Rank: 500 Posts View User Profile Posts: 446 Joined: Thu Jul 26, 2007 1:07 pm Thanked: 6 times GMAT PREP ?? NEED HELP... by dferm » Mon Apr 21, 2008 12:37 pm If a and b are positive numbers, what are the coordinates of the midpoint of line segment CD in the xy-plane? (1) The coordinates of C are (a, 1-b) (2) The coordinates of D are (1-a,b) Top Quote