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Object of Constant Width - Tetrahedron

Object of Constant Width - Tetrahedron

thingiverse

This shape is perfectly round, with its width remaining constant all the way around. It may seem unusual at first glance, but a board can be run over it as smoothly as one would over marbles. A GIF showcasing these shapes in action can be found here: https://i.imgur.com/YpW7Cej.gifv. This concept was inspired by the book "How Round is Your Circle" written by John Bryant and Chris Sangwin.

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