Simple question: Can Maple plot x = 3

Allan

The Maple Manual says to use a parametric plot to graph a circle.  I've been fiddling with the syntax  but can't seem to get it right.  I want to plot

x^2 - 2x + y^2 = 0,           which can be written as

(x-1)^2 + y^2 = 1

Can someone please give me the PLOT command to plot this circle?

Allan