Nope. Like you said, we've established that a flat surface can be rectangular or circular, and they can even be triangular. Yet the flat earthers ALWAYS portray the flat earth as circular. So they believe it's a circle, just not a 3 dimensional circle ie: a sphere. There's a provable scientific explanation why spheres form in a vacuum. What's the flat-earthers' explanation for mere circles?I have. OK, now you've established that a flat surface can be rectangular. . . ready?. . . hold on. . . or circular!
Perhaps you're having a problem with "circular" and "spherical."