Subject: Re: rotating a needle 360 degrees
Date: Fri, 08 Oct 2000 10:27:06 -0400
From: Alex Bogomolny

It was a conjecture by Kakeya that deltoid has the smallest area needed for a line segment to turn 360 degrees.

Besicovitch showed that there is no least area. In other words, for any given number, however small, there exists a figure of that area such that a given segment may be moved without crossing the figure's border and at the end to get rotated by 360 degrees. All the best,
Alexander Bogomolny

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