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Math and Arithmetic
René Descartes

How did Descartes think of the coordinate planes?


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April 29, 2016 10:11AM

It is said that he was ill and in bed. He looked up at the ceiling where he noticed a fly. He figured out that knowing the distances from a corner of the ceiling along the two adjacent sides of the ceiling will uniquely identify its location. So, if the corner of the ceiling was the origin and the two adjacent sides were the axes, you have the Cartesian plane.