Universal Cork

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This Demonstration shows a cork that can fit into holes that are circular, rectangular, or have the shape of an equilateral triangle.

Contributed by: Izidor Hafner (October 2014)
Open content licensed under CC BY-NC-SA

Snapshots

Reference

[1] M. Gardner, The Colossal Book of Short Puzzles and Problems, New York: W. W. Norton, 2006 p. 142.


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