document.write( "Question 1028074: mary knows that the peimeter of a square is 12 inches. she knows that three of the sides are 3 inches lomg. Hoe long is the 4th side? \n" ); document.write( "
Algebra.Com's Answer #643255 by fractalier(6550)\"\" \"About 
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The perimeter is the sum of all four sides. Three sides of 3 inches sum to 9 inches. Thus the missing 4th side must also be 3 inches.
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