Answer:
Part I: 2πr*X/360
Part II: 2.5 radians
Part III: 143.24°
Explanation:
Part II: and Part III: 2π(6)*x/360 = 15, x = 143.24°
143/360 = x/2π, x = 2.5 radians
5.1m questions
6.7m answers