document.write( "Question 253415: 4. If the perimeter of a rectangle is 8√2 cm, what is the smallest possible value of the length of one of its diagonals in cm?\r \n" );
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document.write( "I've tried: \n" );
document.write( "let length be l, width be w, and diagonal be d \n" );
document.write( "let l be x, then w will be: \n" );
document.write( "(8√2-2x)/2 = 4√2-x\r \n" );
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document.write( "d^2=l^2+w^2 \n" );
document.write( " =x^2+(4√2-x)^2 \n" );
document.write( " =x^2+(32-8√2x-x^2) \n" );
document.write( " =32-8√2x... \n" );
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