how many sides does a circle have?

as the number of sides on a regular polygon increases, it becomes more like a circle

http://mathcentral.uregina.ca/qq/database/qq.09.00/georganne1.html

A circle does not have any sides. It is a two-dimensional geometric shape that consists of all the points in a plane that are equidistant from a fixed center point. A circle is defined by its radius, which is the distance from the center point to any point on the circumference of the circle. The circumference of a circle is a curved line, not made up of straight segments like sides, which is why a circle does not have any sides.