document.write( "Question 829767: Hannah drew a circle with a radius of 30 centimeters. Jonas drew a circle with a rsdius of 20 centimeters. What is the approximate difference in the sreasif their circles \n" ); document.write( "
Algebra.Com's Answer #500139 by JulietG(1812)\"\" \"About 
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Do you remember how to find the area of a circle?
\n" ); document.write( "Pi * r^2
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\n" ); document.write( "Hannah's circle has a radius of 30cm. 30cm * 30cm = 900 cm^2.
\n" ); document.write( "Multiply that by pi (we'll use 3.14) to get 2826 cm^2
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\n" ); document.write( "Jonas' circle has a radius of 20cm. Let's square that. 20cm * 20cm = 400cm^2.
\n" ); document.write( "Multiply that by pi to get 1256 cm^2.
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\n" ); document.write( "Now it's simple subtraction. 2826 - 1256 = 1570cm^2
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