We have to be careful here. First, I want to be sure that you know that there's
no such thing as a "square acre".
"Acre" is a unit of area, specifically, 43,560 square feet of area, or 4,840 square yards.
The acre can be any shape at all, with any combination of dimensions at all, just
as long as it encloses that much area.
Now, you're asking: "If the acre happens to be square, what are its dimensions ?"
The answer is: the square root of (43,560 square feet) = 208.71 feet on each side. (rounded)
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20 by 20?
It is not necessary to say square acre as an acre is a measurement of area. It is equal to 43,560 square feet. The linear dimensions may be any two numbers in feet whose product is this.To add another take on this, if you are talking about a square with an area of one acre, the square would have the following dimensions:Side lengths - 208.7 feetPerimeter - 834.8 feetDiagonal - 295.1 feet
An acre contains 43,560 square feet. The actual dimensions of the lot can vary, perfectly square would be just under 209 by 209 feet.
An acre contains 43,560 square feet. So half that would be 21,780 square feet. The dimensions can vary as long as it gets to that size. An approximation would be 105 feet by 207 feet.
1 acre = 43,560 square feet2.5 acres = 108,900 square feetIf it's a square, then each side is sqrt(108,900) = 330 feet