Posted by Anonymous on Sunday, November 13, 2011 at 1:48am.
in a circle with diameter of 12 inches, a regular fivepointed star is inscribed. what is the area of that part not covered by the star?

solid mensuration  Reiny, Sunday, November 13, 2011 at 9:47am
Not such an easy question.
Here is your problem with a really nice diagram.
http://www.contracosta.edu/legacycontent/math/stararea.htm 
solid mensuration  Andrey tanio, Tuesday, January 13, 2015 at 5:38am
72. 7 sq inches