Answer:
6.28
Explanation:
Its the formula 2πr. The diameter is 2 and the radius is half of 2 so 1. Just plug in 1 for r and multiply everything together.
6.28 km
Circumference formula:
C = 2πr
To find r:
r = d/2
r = 2/2
r = 1
Work:
C = 2(3.14)(1)
C = 6.28
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