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March 14th, 2013, 03:02 AM  #1 
Newbie Joined: Mar 2013 Posts: 4 Thanks: 0  what number I should use for the cicumference of a circle
The diameter fits into a circle 3 times approx(3.14). This number is infinite but rounded off. Thus, for any circle, if you divide the circumference by the diameter you get a number close to pi; are there any picture example of this, as I would like to try this method? The number for the circumference, is that "360" or is that incorrect is another number ??? 
March 14th, 2013, 03:48 AM  #2 
Math Team Joined: Apr 2012 Posts: 1,579 Thanks: 22  Re: what number I should use for the cicumference of a circl
360 is the number of DEGREES in ANY circle. It is independent of the circumference.

March 14th, 2013, 07:56 AM  #3  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,279 Thanks: 1023  Re: what number I should use for the cicumference of a circl Quote:
circumference = pi * diameter so: pi = circumference / diameter This'll give you whatever was originally used as pi's value.  
March 14th, 2013, 07:59 AM  #4 
Global Moderator Joined: Dec 2006 Posts: 20,469 Thanks: 2038 
An angle of 2? radians is the same as one of 360°. Hence the two are interchangeable, but it's usually convenient in a given context to use one form and stick to it.


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