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Circle area is
A = pi r^(2)
Where
pi = 3.14
r = d/2 = 18m/2 = 9m
Hence
A = 3.14 x (9m)^(2)
A = 3.14 x 81m^(2)
A = 254.34 m^(2)
A circle with a radius (d/2) of 9 meters has a circumference of 56.5 meters.
The diameter of a circle with an area of 37.68 is 6.92
To find area of a circle using diameter, you use this formuler. Area=pi(diameter/2)(diameter/2)
A circle with a diameter has an area of 50.265486543928724876568901 sq. ft.
The area of circle that has diameter of 14 centimeters is: 153.9 cm2