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What is the area of a circle if its diameter is 9 centimeters?

Updated: 12/17/2022

Wiki User

∙ 13y ago

Best Answer

The formula for a circle's area is pi*radius*radius.

The diameter is equal to two times the radius.

D = 2*radius

So, the radius is 4.5 cm

Area = pi*radius*radius = 3.14159 * 4.5cm * 4.5cm = 63.617 cm2

Wiki User

∙ 13y ago

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What is the area of a circle with a radius of 9 centimeters?

The area of a circle with a radius of nine centimeters is: 254.5 cm2

What is the area of a circle 9 in diameter?

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Exact area of the circle: 9*pi inches

What is the area of a circle with a diameter of 9 dm?

The area is 63.617 dm2

What is the exact area of a circle having a diameter 6in.?

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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).

What is the area of a circle with a radius of 9 centimeters?

The area of a circle with a radius of nine centimeters is: 254.5 cm2

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If 9 cm is the diameter, I think the circumference should be 9 times pi centimeters, which is approximately 28.274333882308139146163790449516 centimeters for the circumference. *********************************************** The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle. Thus: 3.14 x 9 = 28.26cm

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