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Mathematics 14 Online
OpenStudy (anonymous):

What is the circumference, to the nearest tenth, of a circle with a diameter of 9ft? a. 63.6ft b. 28.3ft c. 56.5ft d. 14.1ft I came up with 63.6ft or 28.3ft. Not sure of formula.

OpenStudy (anonymous):

Diameter is twice the radius. What's the equation for circumference if you know the radius?

OpenStudy (anonymous):

the formula is 2*pi*r so you would take half the diameter and multiply it by 2*pi

OpenStudy (anonymous):

That makes it much more clear..thanx! I was trying to make it harder than it was!

OpenStudy (anonymous):

I do that all the time :p Welcome!

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