document.write( "Question 290385: one side of a parallelogram is 4 mm long, and another side is 5 mm long. what is the perimeter? \n" ); document.write( "
Algebra.Com's Answer #210102 by brucewill(101)\"\" \"About 
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Since the opposite sides of a parallelogram are equal, it would be 4 + 5 + 4 + 5 = 18 mm.
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