The idea that position could be identified by ordered pairs of numbers on a set of crossed number lines is thought to have been 'discovered' by Rene Descartes in the early 1600's. Apparently he thought of it while watching a fly crawl around on ceiling tiles. He identified the location of a point on a flat suface using two numbers, written as an ordered pair (x , y) where the x number determined right/left position, and the y number up/down position. For example, the point (3 , -5) would be located three to the right and 5 down. Let's see how good you are at identifying points located this way. Below is a Cartesian coordinate system with some points located on it. Identify each of the points, and send us your solutions; we'll get back to you within 24 hours with your score. There are 11 questions. Enter the points with brackets and a comma between: for example,   (-5 , 3) Point A:    Point D:    Point G: Point B:    Point E:    Point H: Point C:    Point F:     Point I : Point J:    The center point: Make sure you enter the information below correctly if you want to receive your score. Your Name: (Required) Your E-Mail address: (Required)    or return to ... Math Pages | Science & Math | Worsley School Content, Graphics, & Design by Bill Willis © 2000 Wunderland Website Design