find a lengthy search. Do not round. Part 1. NO LINKS!!

Answer:
9) 14π cm
11) 7π cm
Step-by-step explanation:
9) 2π * 8 * 315/360 = 14π cm
11) 2π * 14 * (π/2)/(2π) = 7π cm
We need length of arc
#9
So
L=
#11
L