Yes. I can cut a cylinder or natural cone perpendicularly to get a circle, while other angles would yield an ellipse
Shoot, just read this and realised that it makes no difference for a sphere. https://primal.net/e/note1fgpdhma589puznxd3m462nd8v0kvph03nkfqzugn90rnd5mxs6hqul5s7l