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Question

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anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

d is diameter by the way

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

Of course I'm glad you get it!