Respuesta :

Answer:

A. 56.52 cm

Step-by-step explanation:

Formula:

Circumfrence= 2πr

r(radius) = 9 cm

C = 2πr

C = 2 x 3.14 x 9 cm

C = 6.28 x 9 cm

C = 56.52 cm

Circumfrence is 56.52 cm