SOLUTION: What is the length of each side of a rectangle when the perimeter is 84?

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Question 379252: What is the length of each side of a rectangle when the perimeter is 84?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If they're all equal (a square) it's 21, 84/4.
If not, there's not enough info.