The area of a circle, if the diameter is 18 yards, is: 254.5 square yards.
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The circumference of a circle with a diameter of 18 yards is: 56.55 yards (diameter x Pi = circumference).
The area of a 18-inch diameter circle is: 254.5 square inches.
False because it is the other way around in that if the diameter is 18 yards then the radius is 18/2 equals 9 yards.
Area of circle: 81*pi square feet
A circle with a diameter of 18 meters has an area of 254 square meters.