The radius form of the circle equation will be in the default format of (x - h)2 + (y - k)2 = r2, with the (h, k) be the center. This equation is helpful, since you can easily calculate the center and the radius. The below given is the Circle graph formula for calculation of coordinates points and radius for the circle to be drawn. Just substitute the radius (r) value in the Circle graph equation formula to get the radius value along with the coordinates (0,0).
You can also click on the related calculator designed based on the Circle graph formula to verify your manually determined results.