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October 20, 2014

October 20, 2014

Posted by **Anonymous** on Friday, May 4, 2012 at 8:33pm.

- geometry -
**bobpursley**, Friday, May 4, 2012 at 10:02pmarc length= angle*radius

= radius*2 arcsin(chord/2radius)

but if area=100PI, then radius must be 10

arclength=20 arcsin (6/20)=20*.305=6.1 units. http://mathworld.wolfram.com/CircularSegment.html

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