document.write( "Question 478014: I'm having Geometry homework trouble. Please help, if you can!\r
\n" ); document.write( "\n" ); document.write( "My homework question says: Determine (a) the area and (b) the circumference of the circle. Use the π key on your calculator and round your answer to the nearest hundredth (My calc doesn't even have that symbol). \r
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\n" ); document.write( "\n" ); document.write( "Also, does the π symbol me \"pi constant\"? Thank you for your help. \r
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Algebra.Com's Answer #327542 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "given: \r
\n" ); document.write( "\n" ); document.write( "radius \"r=13mm\"\r
\n" ); document.write( "\n" ); document.write( "Determine: \r
\n" ); document.write( "\n" ); document.write( "(a) the area and \r
\n" ); document.write( "\n" ); document.write( "(b) the circumference of the circle\r
\n" ); document.write( "\n" ); document.write( "(a) the area of the circle is\r
\n" ); document.write( "\n" ); document.write( "\"A=r%5E2%28pi%29\"\r
\n" ); document.write( "\n" ); document.write( "since \"%28pi%29=3.14\", we will have\r
\n" ); document.write( "\n" ); document.write( "\"A=%2813mm%29%5E2%283.14%29\"\r
\n" ); document.write( "\n" ); document.write( "\"A=%28169mm%5E2%29%283.14%29\"\r
\n" ); document.write( "\n" ); document.write( "\"A=530.66mm%5E2\"\r
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\n" ); document.write( "\n" ); document.write( "(b) the circumference \"C\" of the circle\r
\n" ); document.write( "\n" ); document.write( "\"C=2r%28pi%29\"\r
\n" ); document.write( "\n" ); document.write( "\"C=2%2813mm%29%283.14%29\"\r
\n" ); document.write( "\n" ); document.write( "\"C=%2826mm%29%283.14%29\"\r
\n" ); document.write( "\n" ); document.write( "\"C=81.64mm\"\r
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