In geometry, a vertex is typically defined as a point where two or more curves, lines, or edges meet. However, when we refer to a circle, the concept of vertices does not apply in the traditional sense because a circle is defined as a continuous curve without any corners or angles.
A circle is characterized by its center point and radius, rather than vertices. The entire perimeter of a circle is smooth and round, so there are no distinct points where lines meet as you would find in polygons.
Therefore, to directly answer the question: a circle does not have vertices. Instead, it is based on the concept of a center and infinite points that make up its circumference.