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Topic: How to prove that angle in a Circle is 2 Pi Rads ?
Replies: 11   Last Post: Jun 8, 2009 9:23 AM

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Registered: 10/30/08
Re: How to prove that angle in a Circle is 2 Pi Rads ?
Posted: Jun 5, 2009 12:28 AM
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On Jun 4, 3:26 pm, don <tecum...@nc.rr.com> wrote:
> The circumference of a circle equals 2 pi times the radius. This means that if you divide the circumference by the radius you will get 2 pi. Use the definition of a radian and you see that there are 2 pi radians in a circle (circumference). Therefore, 2 pi radians are equal to 360 degrees.
>    Let me know if you think this is a good enough proof for what you asked.
>       Good question.

that's very clear.

but mine question is..,

Is the concept of angle in a Circle(i.e.360degrees)is an *Axiom*?

like Lynn Kurtz sir had said in his first reply :-(

The introduction of numbers as coordinates [...] is an act of violence

HermannWey Weyl

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