My Math Forum what number I should use for the cicumference of a circle

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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
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Re: what number I should use for the cicumference of a circl

Quote:
 Originally Posted by hansolo 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 ???
Hard to tell what you're asking Hans.
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: 20,926 Thanks: 2205 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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# name of part of cicumference of circle

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