254.47
radius:
= diameter/2
= 18/2
= 9
Area of circle:
= pi * radius2
= 3.1416 * 92
= 3.1426 * 81
= 254.47
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The area of a circle whose diameter is 18 inches is: 254.5 square inches.
Using 3.14 as Pi the area of circle is: 254.34
circumference = pi*18 cm area = pi*92 square cm
A circle with a radius of 9 cm has an area of 254.47 square cm
A circle with a radius of 18 centimeters has an area of 1017.88 square centimeters.