Answer: B.) 84°
Step-by-step explanation:
Given the following :
Radius of circle(r) = 15cm
π = 22/7
Length of arc (L) = 22cm
The length of an arc is calculated using :
Length (L) = (Θ / 360) × 2πr
22 = (Θ / 360) × 2 × 22/7 × 15
22 = Θ × 660 / (360 * 7)
22 = Θ × 660 / 2520
Θ × 660 = 22 × 2520
Θ = 55440 / 660
Θ = 84°
