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Problem of the Week 1070
Straighten the Circle
It is easy to fill an open disk with open line segments that do not intersect: just use all the horizontal chords. Is it possible to fill a closed disk with closed line segments (having nonzero length) that do not intersect?
Source: Problem 1070 was used as a Problem of the Week a long time ago. It was in Joe Konhauser's files (and appeared in our MAA book Which Way Did the Bicycle Go?), but we do not know who originated it.
© Copyright 2007 Stan Wagon. Reproduced with permission.