1.2732 square units.
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If the circle's area is four square units, the circumference is 7.089 units.
If the area is a circle, the circumference is 0.28 miles.
1.25
area from circumference area = ( circumference2 / (4 * pi) ) area = 2.865 square feet (approx)
If its diameter is 4 units in length then:- Area of circle: pi*2^2 = 4*pi square units Circumference of circle: 4*pi units