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Q: The diameter of a circle is 9 inches What is the area?

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The area of a circle with a diameter of 9 inches is: 63.62 square inches.

Area = 63.6 square inches.

Exact area of the circle: 9*pi inches

The radius is 9 inches because area of circle is pi*9 squared = 81pi square inches and the diameter is twice the radius which is 2*9 = 18 inches

Area = pi*9*9 square inches

Exact area of the circle: 9*pi inches

It is: 9*pi square inches

Using 3.14 as Pi the area of circle is: 28.259999999999998

R=D/2. If the diameter of a circle is 18 inches, the radius is 9 inches. Radius = 1/2 diameter or 9"

The formula for area of a circle is: A = (pi)*r^2 If the diameter of a circle is 6 then the circle's radius is 3. So, A = (pi)*(3)^2 A= 9*(pi) inches squared or A = 28.26 inches squared (rounded)

The circumference of 9 inch diameter circle is about 28.27 inches.

A circle with a diameter of 9 yards has an area of 63.62 square yards.

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