document.write( "Question 765457: find the area triangle of sides 5cm,6cm,7cm \n" ); document.write( "
Algebra.Com's Answer #466161 by tommyt3rd(5050)\"\" \"About 
You can put this solution on YOUR website!
Heron's formula:\r
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\n" ); document.write( "\n" ); document.write( "\"%0D%0AA=sqrt%28s%28s-a%29%28s-b%29%28s-c%29%29%0D%0A\"
\n" ); document.write( " where the semiperimeter is
\n" ); document.write( "\"%0D%0As=%28a%2Bb%2Bc%29%2F2%0D%0A\"\r
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\n" ); document.write( "\n" ); document.write( "a=5, b=6, c=7, s=18/2=9\r
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\n" ); document.write( "\n" ); document.write( "by substitution and simplification we get\r
\n" ); document.write( "\n" ); document.write( "\"A=6sqrt%286%29\"\r
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