A circle is a closed shape simple figure in which all the points lying on the surface of the circle joining its centre are equal and known as radius of the circle. A huge collection of circles is called a family of circles. There are various types of circles available around us. Family of circles is one of the most important parts of coordinate geometry in which different circles are present at the same time, through which the calculations to find the values in circles becomes easy. The circles consisting of the same properties are combined together in various ways to form the family of circles. The general equation of the circle can be given as x2 + y2 + 2gx + 2fy + c = 0. However, the equation contains three unknown figures i.e. g, f and c so we require at least three conditions to get a unique circle.