`path-new-figure-with-arc!``PATH``XCENTER``YCENTER``RADIUS``START-ANGLE``SWEEP``#!optional``NEGATIVE?`procedureStarts a new figure that starts with an arc segment at

`XCENTER`and`YCENTER`with`RADIUS`for`PATH`.`START-ANGLE`and`SWEEP`describe what angle to start from and the angular length of the arc in radians. If`NEGATIVE?`is`#t`, the arc will be drawn counter-clockwise, otherwise clockwise. Note that this is commonly used to draw circles.