Circle and Ovals
Circle has no vertex, sides
A circle or a sphere
Any closed figure that is not entirely composed of straight sides, such as an ellipse or a circle.
A closed figure with no straight sides could be a circle, an ellipse, or an irregular loop.
A circle :D
Yo, anything that's sides are the same as the other, yo got a symmetric figure. example: a circle
A circle with any radius, including zero.