Thursday, November 29, 2012

[qnfiwolk] Cross sections of a cube

What is the largest cross section of a cube?  Candidates are the 1-by-sqrt(2) rectangle, the regular hexagon, and the equilateral triangle.  It might be none if these.

Along with the square, are these all the "interesting" cross sections?  Interesting vaguely defined as extremal in area by a plane moving normally.  I suspect the hexagon is minimal in area.

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