In geometry , A circle is defined as a shape consists of set of infinite points in a plane that are equidistant from a certain point which is called the center of the circle.
Thus the circle is the best term which describes the set of all points in a plane that are a certain distance from a single point.
<span>(x^2)/36 - (x^4)/1944 + (23x^6)/2099520 - (11x^8)/44089920 + (563x^10)/95234227200
radius of convergence = DNE (the series does not converge)</span>