Respuesta :

Answer:12.57

Step-by-step explanation:

C=2πr

   =2·π·2

   =12.56637

Answer:

A.

2 x 2 = 4 so 4 is the diameter because the diameter is double the radius

diameter x pi = circumference

4 x pi = 3pi or 12.56

8 x pi = 8pi or 25.12

Step-by-step explanation:

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