(PECL imagick 2.0.0)
ImagickDraw::arc — Draws an arc
$sx
   , float $sy
   , float $ex
   , float $ey
   , float $sd
   , float $ed
   )This function is currently not documented; only its argument list is available.
Draws an arc falling within a specified bounding rectangle on the image.
sx
     Starting x ordinate of bounding rectangle
sy
     starting y ordinate of bounding rectangle
ex
     ending x ordinate of bounding rectangle
ey
     ending y ordinate of bounding rectangle
sd
     starting degrees of rotation
ed
     ending degrees of rotation
No value is returned.