Small circles are geometric shapes defined as the set of all points in a plane that are equidistant from a central point, known as the center. The distance from the center to any point on the circle is called the radius. Small circles can be found in various contexts, such as in nature, art, and design. In mathematics, small circles can be used to illustrate concepts like circumference and area. The formula for the circumference of a circle is C = 2πr, where C is the circumference and r is the radius. The area of a circle is calculated using the formula A = πr².