document.write( "Question 1117223: In a circle with diameter of 12 inches, a regular five-pointed star is inscribed. What is the area of that part not covered by the star?\r
\n" ); document.write( "\n" ); document.write( "Answer: 72.68 square inches \n" ); document.write( "
Algebra.Com's Answer #732271 by math_helper(2461)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Area of circle is \"+pi%2Ar%5E2+=+pi+%2A+6%5E2+=+36%2Api+\" or about 113.0973 sq in.
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\n" ); document.write( "\n" ); document.write( "Area of regular 5-pointed star is \"++%2810tan%28pi%2F10%29+%2F+%283-tan%5E2%28pi%2F10%29%29+%29+r%5E2+\" approx = \"+10%2A%280.32492%29%2F%283-%280.32492%5E2%29%29%2A36+=+40.4125+\" sq in
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\n" ); document.write( "\n" ); document.write( "Subtract the area of the star from that of the circle to get 113.0973 - 40.4125 = 72.6848 sq in\r
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