Sujet: 4 dimensions liste de sujets
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	The distance between 2 lines in 4D		2013-04-01
		samane pose la question : how can i measure the distance between 2 lines in 4D?? Chris Fisher lui répond.
	A four dimensional object		2001-02-14
		A student pose la question : Can you give me some examples of a four dimensional object you can find around your house? Harley Weston lui répond.
	Measuring the fourth dimension		1999-06-07
		Suzanne Hall pose la question : Hi! The other day, two of my students asked a very interesting question: Is the fourth dimension measured with hypercubes? Their reasoning went like this: Lines are 1D and are measured with line segments, which are part of a line. Planes are 2D and are measured with squares, which are part of a plane. Space is 3D and is measured with cubes, which are part of space. So, logically, hypercubes would be used to measure the fourth dimension. Chris Fisher lui répond.

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