Any closed shape in 2-dimensions can have any area.
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Square
Some do: a square 2 units on a side, for example, has area 4 units, perimeter 8.
A shape that is 4 x 4 x 2 is not a cube. The surface area of this object is 64 square units.
The area of a shape is measured in square units
The radius of the circle is 2 units. * * * * * If the area is 4 units, the radius is 1.128 units