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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.
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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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