The length of an arc of a sector of angle θ° of a circle with radius R is
Length of an arc of a sector of angle 
of a circle with radius R
= Circumference of circle × 
= 
22
The length of an arc of a sector of angle θ° of a circle with radius R is
Length of an arc of a sector of angle of a circle with radius R
= Circumference of circle ×
=