Posted by **awl** on Monday, February 23, 2009 at 6:56pm.

What is the circumference and the area of a circle with a radius of 9.3mm.

- math -
**Willow**, Monday, February 23, 2009 at 7:09pm
I don't remember the equations exactly, but I know there are equations to find that. Just go an a search engine and type in "circumference equation" or "area equation" and you'll find it.

- Read this first! I found the formula for circumference. -
**Willow**, Monday, February 23, 2009 at 7:13pm
The circumference formula is:

c = pi times diameter

OR

c = 2piradius

Sorry, I don't know how to make a pi symbol on the keyboard. :)

I couldn't find the area formula... but just place 9.3 in where I said radius.

Hope I helped! :)

- math -
**awl**, Monday, February 23, 2009 at 7:17pm
Thanks Willow

- math -
**Damon**, Monday, February 23, 2009 at 7:31pm
area of circle = pi r^2

- You're welcome! -
**Willow**, Monday, February 23, 2009 at 7:59pm
:)

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