¶ Balls Coming Together (2)
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Index Entry
Therefore, all it can do is evolute. The three balls can evolute . . . like a rubber doughnut. I could have it open as a torus. They could open its top and come in at the bottom, so they have a degree of freedom. Now I have a fourth ball that comes around in there and it nests on top of these. Now it can no longer even evolute and, for the first time, all motion is blocked. This makes a tetrahedron: I connect the centers of these spheres as a tetrahedron. This is where stability begins. The tetrahedron is where the triangle gives what we call a ‘structure’ or something that doesn’t change its pattern any more. It was dynamic up to that time.
