Cartesian Plane

Today we had a busy morning, in maths we learnt about the Cartesian plane. I learnt that the Cartesian plane is a mathematical discovery that Rene Descartes discovered. The story was that one night he was in bed and he was watching a fly crawl across the ceiling of his bedroom and he wanted to find a way to describe the exact position of the fly on the ceiling. He began by picturing the ceiling covered with grid lines about 1 metre apart. If he started in the bottom left corner he could describe the position of the fl as three across and two up. He named the starting point at the bottom left corner as the origin. That is how Rene Descartes discovered the Cartesian plane method