Operator: X Y r ang1 ang2 arc
The arc operator draws an arc of some number of degrees, with a given radius and center. The arc is generated by sweeping a line segment of length r, and tied at the point X Y, in a counter-clockwise direction from an angle ang1 to an angle ang2.
Example:
%! newpath 150 500 100 0 270 arc 15 setlinewidth stroke showpage
