Please Help (math)

Circumference = 2 pi r = 2 * 3.14 * 6.48

 

Angle pq = 360 - 73 - 150-65 =72 degrees

 

Arc is a fraction of total circumference    72 / 360 ths of the total circumference

         72/360     *     2 * 3.14 * 6.48    = .......