Algebra.Com's Answer #156378 by Edwin McCravy(20056)![\"\"](\"/images/stars/stars-13.gif\")  
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Edwin's solution:
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document.write( "I'm having trouble understanding this statement: If triangle ABC is similar to triangle DEF
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document.write( "AB=4, BC=8, AC=11
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document.write( "DE=10, EF=20, DF=n Solve for n.\r
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document.write( "I know the perimeter of a triangle is P=a+b+c but I can't seem to solve for n. It's like there are 2 unknowns. Can you please let me know what I am doing wrong. Thank-you!\r
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document.write( "You're supposed to do this by proportions:\r\n" );
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document.write( " (DF is to AC) as (DE is to AB) as (EF is to BC)\r\n" );
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document.write( "Write the proportion as an equation:\r\n" );
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document.write( "Substitute their lengths:\r\n" );
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document.write( "Reducing the fractions:\r\n" );
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document.write( "Cross multiply:\r\n" );
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document.write( "Edwin \n" );
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