Question

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Answer 1

Well the formula for circumference of a circle is either\[2\Pi r\] or \[\Pi d\]

Answer 2

So if you have a circumference of 4pi, plug it in to get
\[4\Pi = \Pi d\]

Answer 3

d is diameter by the way

Answer 4

No because all you have to do is divide each side by \[\Pi \] to get \[4=d\]

Answer 5

No, the circumference is equal to the diameter times pi.

If you have a circle with diameter of 6, then multiply the diameter times pi. Your circumference is 6pi

Answer 6

So I think you're thinking about this the hard way. Just think about plugging the circumference into a formula and solving for an answer. If the formula is \[C=\Pi \times d\]
just plug in the number you have for C and then solve for d

Answer 7

The number you have is \[4\Pi \] so plug that in for the variable C

Answer 8

Of course I'm glad you get it!