Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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#1 2013-05-26 21:46:51

{7/3}
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What is this?

"in any circle a central angle is proportional to the arc it creates"-is this a postulate or proposition?

Last edited by {7/3} (2013-05-26 21:48:23)


There are 10 kinds of people in the world,people who understand binary and people who don't.

#2 2013-05-26 23:51:37

bob bundy
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Re: What is this?

In book 3 of the Elements, Euclid treats it as a postulate (definition).

definition 11. Similar segments of circles are those accepting equal angles,

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

#3 2013-05-27 00:08:01

{7/3}
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Re: What is this?

Thanks.


There are 10 kinds of people in the world,people who understand binary and people who don't.

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