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

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The diameter of a circle is twice the radius. A circle with a radius of 9 would have a diameter of 18. (9*2=18).

The diameter of a circle who's circumference is 28.26 miles is: nine (9) miles

18 inches

The area is 40/360*pi*r^2 = 28.16 square cm.

Area(A)/ Area(B) = pi*rA2/pi*rB2 = rA2/rB2 = 16/81

Related questions

A circle with a radius of 9 cm has an area of 254.47 square cm

Circle area = (pi)r2 = 254r2 = 254/pir = √254/pi ≈ 92r = diameter = 2(9) = 18 cm

The exact area = pi*32 or 9*pi square cm

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

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

A circle with a radius of 4.5 cm has a circumference of 28.27 cm

The area of a circle with a diameter of 9 feet is 63.6 sq ft (approx).The area of a circle with a diameter of 9 feet is 63.6 sq ft (approx).The area of a circle with a diameter of 9 feet is 63.6 sq ft (approx).The area of a circle with a diameter of 9 feet is 63.6 sq ft (approx).

28.27 cm

3.14

The area of a 9-meter diameter circle is 63.617 square meters.

The area of a circle is figured out using the formula Now, the circle we are given has a radius of 9cm. So, the area of the circle would be: Area = 3.14 x (9)2 = 3.14 x 81 = 254.34 cm2 The area of the circle in question is 254.34 cm2

18mm or 1.8 cm

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