Respuesta :

xenia168

Answer:

Step-by-step explanation:

C = 2 [tex]\pi[/tex] r

C = 16 [tex]\pi[/tex]

[tex]\beta[/tex] = 2 [tex]\pi[/tex]  ÷ [tex]\frac{16\pi }{21}[/tex] = [tex]\frac{21}{8}[/tex]