document.write( "Question 208740: an isosceles triangle has two sides of equal length. the length os the third side is 4 ft less than twice the length of an equal side.\r
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document.write( "Find the length of the third side when the perimeter is 20 ft. \n" );
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Algebra.Com's Answer #157918 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! x+x+(2x-4)=20 \n" ); document.write( "2x+2x-4=20 \n" ); document.write( "4x=20+4 \n" ); document.write( "4x=24 \n" ); document.write( "x=24/4 \n" ); document.write( "x=6 ft. is the length of the equal sides. \n" ); document.write( "2*6-4=12-4=8 ft. is the length of the third side. \n" ); document.write( "Proof: \n" ); document.write( "6+6+8=20 \n" ); document.write( "20=20 \n" ); document.write( " |