Seven Cylinders

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Three cylinders, each of unit diameter and length , are arranged in a triangle perpendicularly around a similar cylinder. Now each of the cylinders touch the other three. Place another three cylinders below the original three cylinders. Extend the length of each cylinder in one direction and rotate one of the sets of three cylinders until each of the seven cylinders touches the other six.

Contributed by: Sándor Kabai (October 2008)
Open content licensed under CC BY-NC-SA




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