A circle is a two-dimensional geometric shape defined by the set of points that are all the same distance from a central point, called the center. A circle does not have any sides or corners, it is defined by its perimeter or circumference which is the outer edge of the circle and by its area which is the space inside the circle .
So, to answer your question, a circle has no sides. It is defined by its circumference (distance around the circle) and its diameter (a line segment that runs through the center of the circle and touches two points on the circumference).
