Q: What is the area of the circle if the diameter is 18 centimeters?

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18

The diameter of a circle with a circumference of 18 is: 5.73

A linear foot is the same as a foot. So, an 18-foot diameter circle would measure 18 linear feet in diameter!

Well, darling, the area of a circle is calculated using the formula A = πr^2, where r is the radius. So, plugging in 18 cm for the radius, we get A = π(18)^2 = 324π cm². So, the area of a circle with a radius of 18 cm is 324π square centimeters. Voilà!

To find area of a circle, the formula is πr2 where π is pi. Half of the diameter is the radius (r) so you divide 18 by 2 to get the radius (9). then, you square it (multiply it by itself) giving you 81. You then multiply this by pi to get the area. The exact answer is 81π, with a good approximation of: 254.46900494077325231547411404563973361997072134938357149897

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The area of a 18-inch diameter circle is: 254.5 square inches.

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It is 18 centimeters because your radius is exactly half of the diameter in any circle

Area of circle = pi*212 = 1385.44236 square cm Area of rectangle = 1385.44236 square cm Lenght of rectangle = 1385.44236/18 = 76.96902 cm Perimeter of rectangle = 2(76.96902)+2(18) = 189.93804 cm

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Area of circle: 81*pi square feet

A circle with a diameter of 18 meters has an area of 254 square meters.