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Posted by **Dan** on Monday, March 14, 2011 at 4:03pm.

- math -
**Ms. Sue**, Monday, March 14, 2011 at 4:35pmCircumference = pi times radius squared.

C = pi * r^2

- math -
**Bosnian**, Monday, March 14, 2011 at 5:01pmAnswer of Ms.Sue is wrong.

The circumference is the distance around a closed curve. Circumference is a special perimeter.

The circumference of a circle is the length around it. The circumference of a circle can be calculated using the formulas:

C=d*pi

Wher d is diameter

OR

C=2*r*pi

Wher r is radius

- math -
**Bosnian**, Monday, March 14, 2011 at 5:07pmYou can check that.

In google type: Circumference

When you see list of results click on :

Circumference-Wikipedia,the free encyclopedia

- math -
**Ms. Sue**, Monday, March 14, 2011 at 5:14pmOoops! I goofed again! I guess I'd better screw my head on tighter.

Of course, Bosnian is right.

C = pi * diameter

I gave the formula for the area.

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