Posted by **Alex** on Tuesday, February 5, 2008 at 9:10pm.

How was it determined that a circle is 360 degrees and all angles of a triangle equal 180 degrees?

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**Sam**, Tuesday, February 5, 2008 at 9:15pm
idk but that's what the teachers say so i believe them..

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**mirza**, Tuesday, February 5, 2008 at 9:43pm
I NEED HELP

- Math -
**Reiny**, Tuesday, February 5, 2008 at 9:33pm
lots of reasons can be found by googling the question

here is just one of them

http://shaunmccarthy.wordpress.com/2006/09/20/360-in-a-circle-60-minutes-and-60-seconds-what-is-so-special-about-60/

The fact that the angles in a triangle add up to 180 is a function of the 360 definition.

Had the circle been defined as 500 degrees, then the angles of a triangle would add up to 250

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