Taking a circle as an example, this paper discusses the characteristics of the equation of a curve if it is symmetrical about the X axis, Y axis, coordinate origin and passes through the coordinate origin? Based on the above conclusions, the principles and methods of establishing the Department are discussed

Taking a circle as an example, this paper discusses the characteristics of the equation of a curve if it is symmetrical about the X axis, Y axis, coordinate origin and passes through the coordinate origin? Based on the above conclusions, the principles and methods of establishing the Department are discussed

A circle, let its equation be (x-a) ^ 2 + (y-b) ^ 2 = R ^ 21, if about X axis symmetry, the center of the circle is on X axis, the equation is: x ^ 2 + (y-b) ^ 2 = R ^ 22, if about y axis symmetry, the center of the circle is on Y axis, the equation is: (x-a) ^ 2 + y ^ 2 = R ^ 2; 3, if about coordinate origin symmetry, the center of the circle is on coordinate origin, the equation is: x ^ 2 + y ^ 2