Posted by **Jerald** on Wednesday, March 6, 2013 at 7:09pm.

Thank you Ms. Sue. Sorry I didn't tell you we're just learning that pi=3 for now. It made everything complicated for you to check if my answers were correct. :P

But what is this formula usually used for?Diameter=Circumference/π?

Is it used to find the diameter of something?

- Math -
**Ms. Sue**, Wednesday, March 6, 2013 at 7:12pm
That's ok. I'm glad we've straightened out that problem.

The formula is usually written as

Circumference = pi * diameter

But if we want to find the diameter, we can switch it around to

Diameter=Circumference/π

- Math -
**Jerald**, Wednesday, March 6, 2013 at 7:16pm
And the formula Radius=Circumference/2π

is that used to find the radius? And is it

usually written as Circumference=2πr?

- Math -
**Ms. Sue**, Wednesday, March 6, 2013 at 7:18pm
Yes.

- Math -
**Jerald**, Wednesday, March 6, 2013 at 7:19pm
Okay, thank you again! :D

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