The circumference is about 15.04 feet.
circumference = 18*pi feet
If the radius is 18 feet - then the diameter is 36 feet. The circumference measurement is irrelevant !
Circumference = Pi x d: 18 = 3.14 x 18 = 56.52 feet
The circumference is approx 4.71 feet.
18' 8"
d = 5.73 feet.
56.548667764616276 circumference = PI * diameter
circumference = pi*18 cm area = pi*92 square cm
The circumference of a circle is determined by multiplying the diameter (d) by the number pi. Therefore, the circumference of a circle with a diameter (d) of 18 feet is 18pi or 18x3.14159265358979323846... Roughly 56.54866776461627829228.
The area of a circle that has a circumference of 18 is 25.78 inches squared.
Diameter = 18/pi = 5.73 feet, approx.