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First of all, it's the area that's expressed in square units, not the perimeter. The

perimeter is just a length or a distance, and it's expressed in plain old length or

distance units, like feet, meters, or miles.

To answer the question: The perimeter doesn't tell you the dimensions.

It doesn't even tell you the shape ... circle, square, rectangle, etc.

Here are a few different rectangles. They all have the same perimeter ... 21 units.

0.5 x 10 . . area = 5

1 x 9.5 . . . area = 9.5

2 x 8.5 . . . area = 17

3 x 7.5 . . . area = 22.5

4 x 6.5 . . . area = 26

5 x 5.5 . . . area = 27.5

5.25 x 5.25 . . area = 27.5625

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Q: What is the area of a closed figure with a perimeter of 21 square units?
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