The circumference is 42.538 cm
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The area of a circle with circumference 9.42in is: about 7.061 square inches.
54 cm
A circle with a diameter of 18 centimeters has an area of 254.47 square centimeters.
The area of a circle with a 12-foot circumference is about 11.46 square feet.
The area of a circle with a circumference of 9.42 inches is: 7.06 square inches.