By definition, the arc length is given by: s = R * theta Where, theta: angle R: radio Substituting values we have: s = (34) * ((5/4) * π) s = (34) * ((5/4) * (3.14)) s = 133.45 cm Answer: the length of an arc with a central angle of 5 / 4π radians and a radius of 34 centimeters is: s = 133.45 cm