@superidgit: There is only one definition of perfect: Perfect means entirely without flaw or variation, calculated to an infinite number of decimal places. Anything outside that precise definition is imperfect, no matter how small the imperfection. It is impossible to have a perfect circle in the physical realm (the real world). Perfection is, like infinity, a mathematical concept only. It's not possible to achieve mathematical perfection in any regard in the real world.
@C2: 2 dimensions yes.. 1 dimension no.
@C2: 2 dimensions yes.. 1 dimension no.