Question

circumference of circle whose diameter are 12.8​

Answer 1

Answer:

c≈40.21

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

$c = 2\pi \: r$

r=1/2diameter

r =1/2*12.8

r=6.4

c=2*π*6.4

c=40cm