Answer:
Length of arc AD = 15.7 cm
Step-by-step explanation:
Length of arc = 
Here, θ = Central angle subtended by the arc
r = radius of the circle
From the picture attached,
Central angle subtended by arc AD = 360° - (180° + 66.4°)
= 113.6°
Length of arc AD = 
= 
= 15.655 cm
≈ 15.7 cm
Length of arc AD = 15.7 cm
Answer:
it is 2.6 that is the answer
C = (pi) * d
C / (pi) = d
30 / 3.14 = d
9.55 = d