document.write( "Question 113728: text book by holt pre-algebra page 297 please help in finding the radis of a circle with the giving measurement:\r
\n" ); document.write( "\n" ); document.write( "A=pie cm2
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Algebra.Com's Answer #83662 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
The area of a circle is \"A=pi%2Ar%5E2\", so if you are given the area and need to determine the radius, you simply solve this equation for r, thus:\r
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\n" ); document.write( "\n" ); document.write( "\"pi%2Ar%5E2=A\"
\n" ); document.write( "\"r%5E2=A%2Fpi\" Divide both sides by \"pi\"
\n" ); document.write( "\"r=sqrt%28A%2Fpi%29\" Take the square root of both sides\r
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\n" ); document.write( "\n" ); document.write( "Remember that, in general, when you take the square root of something you have to consider both the positive and negative square roots: \"2%5E2=4\" AND \"%28-2%29%5E2=4\". However, in this case you can exclude the negative square root because you are trying to find a length measurement, and a negative number for a length measurement is absurd.\r
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\n" ); document.write( "\n" ); document.write( "The other thing to consider when presenting your answer is that the Area was given in \"cm%5E2\". Taking the square root of a quantity measured in \"cm%5E2\" means that your result will be in cm.\r
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\n" ); document.write( "\n" ); document.write( "Hope this helps,
\n" ); document.write( "John
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