I would argue we utilize symmetry of rotation and balance along with holding a blade at a fixed point (laythe) or rolling hot metal between two bodies (ball bearings), the avantage / creation of that was one of the crucial advances of humanity (being able to make actual circles / cylinders / spheres, since most objects you mentioned are also 3d)
What makes the circle unique (or a copy / scaling of the unit circle) is that it exists defined by a relationship that is true on the euclidean plane, something itself which is ideal, and only exists in our imaginations.
With mater being quantized at some level, we are always approximating, and for my car's sake, things rolling at several thousand rpms, we have some pretty circular things.
What makes the circle unique (or a copy / scaling of the unit circle) is that it exists defined by a relationship that is true on the euclidean plane, something itself which is ideal, and only exists in our imaginations.
With mater being quantized at some level, we are always approximating, and for my car's sake, things rolling at several thousand rpms, we have some pretty circular things.