formula for the circumference of a circle?

[princess angel]

does anyone know this...

* formula for the circumference of a circle

* how to find the radius

* and the arc of a circle

thanks!

Laura

 

[Dan Murphy]

http://www.mathgoodies.com/lessons/vol2/circumference.html

http://home.xnet.com/~fidler/triton/math/review/mat114/radian/apps/arclen/arc1.htm

 

[becka]

C = 2 * pi * r where r= radius

When you say find the radius what do you mean? Do you mean how do you solve for radius given the circumference?

What do you mean by arc? Do you want the length of the arc? Area of a section of the circle, etc?

 

[princess angel]

thanks Dan, I just knew someone here would be able to help!

becka, I have no idea, my dh needs to know for something for work... some contracting stuff.. so I figured I'd get a head start for him!

thanks a bunch!

Laura