Uh, no.GeorgW said:Circle, maybe. I don't want to argue about the definition of a circle. But a perfect circle, as was requested, has to in some way involve pi, which makes it impossible. It can be computed, yes, but as of now not exactly. So once again, we could come as close to a perfect circle as is ever needed, but it won't be perfect.
A conceptual circle, such as one defined by a mathematic equation, is intrinsically perfect which is to say the distance of each point from the center is exactly the radius. The arc is consistent. The line is perfectly thin. All concentric circles would be perfectly parallel, and hence would never intersect, even as the difference in radii approached zero.
Unless you're messing with the rules, say, toying with the axioms, such as redefining perfect to equate to impossible or has to in some way involve pi, then, no.
238U.