Circumference_Area

A circle is a 2-dimensional object.
 * Circumference-** the formula is 2πR.... R =radius.... π =pi.... you multiply the radius by 2 and then leave it in pi form.
 * Area**- the formula is πR².... you multiply the radius by itself, then leave it in pi form.

1.What is the area if the radius is 4? Answer - 9π 
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 * [[image:http://www.coolmath.com/reference/images/circle1.gif width="162" height="162" align="left" caption="circle graphic"]] ||

area.(online image)[|math.pppst.com/ perimeter.html] 6/17/09

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