Answer:
C = 113.04
Step-by-step explanation:
arc ACB = (Ф/360) * 2πr
81.64 = (260/360) * 2 * π * r
r = (81.64 * 360)
2 * π
r = 17.99 cm
Circumference = 2 * π * r
C = 2 * π * 17.99
