# hijinks

1. ### rectangular and polar hijinks

How do you offset a circle from the origin in polar coordinates or a sphere from the origin in spherical? In other words, is there any way to restate a general rectangular formula for a circle: (x-a)^2 + (y-b)^2 = c^2 In polar coordinates? How about: (x-a)^2 + (y-b)^2 + (z-c)^2 =...