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There is an urban myth that Descartes invented the Cartesian plane by watching a fly on the ceiling and then trying to describe its movements based on its distance from the walls.
no pun in ten did
I don't know which one you consider to be the third one, or what this question has to do with math. Two of the planes were crashed into the World Trade Center. One plane was crashed into the Pentagon although, based on its flight path, its original target is believed to have been the White House but they apparently couldn't find it. The other plane was presumeably intended for the Capitol but the passengers attacked the hijackers, attempting to retake the plane. It crashed in rural Pennsylvania.
ride in a plane. you would fly a plane
On the Cartesian plane (0, 0) is the point of origin where the x and y axes intersect each other at 90 degrees.