Respuesta :

Answer:

56.6mm

Step-by-step explanation:

Take the radius and double it to get the diameter

9mm * 2 = 18mm

Multiply the diameter by pi to get the circumference of the circle

18mm * 3.1415 = 56.547mm

Answer:

Step-by-step explanation:

56.52

C=2 * 3.14 * radius

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