Equation of circle (on line, etc.) In XY coordinates, the radius r of the circle point at C (0,10) is 190, and there is a point B at the intersection of the circle point and the positive half axis of the X axis. When the point B moves on the X axis, the trajectory of the origin C is relatively fast~ In XY coordinates, the radius r of the circle point at C (0, a) is 190, and there is a point B at the intersection of the circle point and the positive half axis of the X axis. When the point B moves on the X axis, the trajectory of the origin C is the same. It's urgent~

Equation of circle (on line, etc.) In XY coordinates, the radius r of the circle point at C (0,10) is 190, and there is a point B at the intersection of the circle point and the positive half axis of the X axis. When the point B moves on the X axis, the trajectory of the origin C is relatively fast~ In XY coordinates, the radius r of the circle point at C (0, a) is 190, and there is a point B at the intersection of the circle point and the positive half axis of the X axis. When the point B moves on the X axis, the trajectory of the origin C is the same. It's urgent~

x^2+(y-10）^2=190