document.write( "Question 974828: ΔABC is similar to ΔDEF. The ratio of the perimeter of ΔABC to the perimeter of ΔDEF is 1 : 10. If the longest side of ΔDEF measures 40 units, what is the length of the longest side of ΔABC ?\r
\n" ); document.write( "\n" ); document.write( "2 units\r
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\n" ); document.write( "\n" ); document.write( "30 units
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Algebra.Com's Answer #596778 by harpazo(655)\"\" \"About 
You can put this solution on YOUR website!
Here is your proportion:\r
\n" ); document.write( "\n" ); document.write( "1/10 = x/40\r
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\n" ); document.write( "\n" ); document.write( "Solve for x to find your answer.
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