# transformation to lines and circles

I'd like to take a circle and apply a transformation to it (such as a reflection or a translation). For instance, if T1 is translation 1 unit right and c1 = circle((0,0),1), I'd like to be able to plot T1(c1) (the image of c1 under T1, which is the circle with new center (1,0)). How can I do this?