If the path is perpendicular to the field it is zero.
If the path is along the field it is positive or negative depending on it's direction.
See the attached picture.
generally for a circular segment of angle, θ° and radius r
= (θ/360) x circumference
= (θ/360) x 2πr
in our case, θ = 60°, π=3.142 and r = 33 cm
substitute into above formula
= (60/360) x 2(3.142)( 33) = 34.5 cm