I FOUND YOUR COMPLETE QUESTION IN OTHER SOURCES.
 PLEASE SEE ATTACHED IMAGE.
 The length of an arc, by definition is given by:
 s = R * theta
 Where,
 R: radio
 theta: angle of the bow.
 We then have to replace:
 s = (6) * (135 * (pi / 180))
 s = 14.1 in
 Answer:
 The length of the arc s is:
 s = 14.1 in