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http://web2.0calc.com/questions/a-a-regular-nonagon-9-sided-polygon-is-inscribed-in-a-circle-as-shown-below-three-of-the-9-vertices-are-selected-at-random-and-the-tri

difficulty advanced
Guest Apr 19, 2015
 #1
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Maybe another mathematician would like to give this one a shot?

#

You are not dumb, I didn't answer it because it was hard and i was short of time.

Maybe I could not have answered it.     

 

Maybe if you play around with part A and really underfstand it, you will be able to figure out part b just as easily as I could.   

I will see if time allows me to look at it more.  

I think a formula for an odd number of sides shouldn't be too hard to develope from what i have done but maybe it is different for an even number of sides.   

 

I put that first line there to try and attract others to take a look.  

Melody  Apr 20, 2015

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