Cartesian Plane

A Cartesian plane is a plane in maths which all points are defined by Cartesian coordinates. It was invented by Rene Descartes, a French Philosopher, Scientist and Mathematician, who was sometimes called the father of 'Modern Philosophy', who was tying to describe the location of a fly on the roof of his bedroom when he created it.

There are two types of Cartesian planes.

Number one is where the coordinates are in the spaces. We use this when trying to identify where we are by using refidex, or when we are playing Battleships.

The other is where the coordinates are on the lines. This is sometime also used in a refidex when the coordinates happen to occur on the lines.