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A circle or an oval (ellipse)

This depends on what one calls a "side". Usually a side needs to be straight, as in the case of polygons.

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Wiki User

10y ago
This answer is:
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Anonymous

Lvl 1
4y ago
Well, a square is a polygon or closed curve of a special type.  What if the equal sides of a square were not straight but equal curves? Is anything really straight but in the imagination?

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Q: What has only one curved side?
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