document.write( "Question 1112131: An equilateral triangle is inscribed in a circle of radius 10cm ,
\n" ); document.write( "Find the area of triangle ??\r
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Algebra.Com's Answer #727148 by ikleyn(52781)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "The area of a regular triangle equals \r
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\n" ); document.write( "\n" ); document.write( "\"S\" = \"3\".\"R%5E2\".cos(60°).sin(60°) = \"3\".\"R%5E2\".\"1%2F2\".\"sqrt%283%29%2F2\" = \"3sqrt%283%29%2F4\"\"R%5E2\", \r
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\n" ); document.write( "\n" ); document.write( "where  \"R\"  is the radius of the circumscribed circle. \r
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\n" ); document.write( "\n" ); document.write( "See the lesson \r
\n" ); document.write( "\n" ); document.write( "    - Area of a regular n-sided polygon via the radius of the circumscribed circle, Example 1\r
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