Answer:
B, θ=137,51°
Step-by-step explanation:
[tex]\alpha =\frac{l}{r}[/tex]
alpha are the angle in radian.
l= lenght of de arc=12cm
r=radius=5cm
[tex]\alpha =\frac{12}{5} \\\\[/tex]
Converting the radian angle to degrees:
α--->θ
π--->180°
θ=(180°*α)/π
using the fact that: α=12/5
θ=(180°*12)/5
θ=432°/π
θ=137,5098°
θ=137,51°
