C = ?
when r = 12 cm.

(C = circumference)
(r = radius)

circumference =2 pie r

so, 2×22/7×r= circumference

44/7r

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm