I've started working a personal program to design shapes with tubing (and produce G-code for a CNC tubing cutter I'm going to build). It's been roughly 20 years since I was last in a vector geometry ...
A circle, by definition, is a two-dimensional shape where every point is equidistant from a single center point. It's neat, it's elegant, and it also happens to be the universal answer to "what shape ...