## PixieDust1 one year ago -

1. anonymous

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

2. anonymous

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

3. anonymous

d is diameter by the way

4. anonymous

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

5. anonymous

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

6. anonymous

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

7. anonymous

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

8. anonymous

Of course I'm glad you get it!