document.write( "Question 312397: What is the exact area of a circle with a diameter of 15 inches\r
\n" ); document.write( "\n" ); document.write( "I think it would be $\"15pi\"$ square inches? \n" ); document.write( "

Algebra.Com's Answer #223302 by Edwin McCravy(20059) $\"\"$ $\"About$

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What is the exact area of a circle with a diameter of 15 inches\r
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document.write( "No that's the circumference, the distance around the circle,\r\n" );
document.write( "not the area, which is the amount of space inside the circle:\r\n" );
document.write( "You found  inches, though the circumference \r\n" );
document.write( "would be in inches, not square inches\r\n" );
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document.write( "You don't want the circumference, you want the area, which is\r\n" );
document.write( "found by the formula \r\n" );
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document.write( "To find the area, we need the radius, not the diameter.\r\n" );
document.write( "The radius is  of the diameter.\r\n" );
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document.write( "So the radius is  or \r\n" );
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document.write( "Substituting  for  in the formula for the area of a circle:\r\n" );
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document.write( " \r\n" );
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document.write( " square inches or about 176.7 square inches.\r\n" );
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document.write( "Edwin

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