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Circumference = 2 x pi x radius. If you want an estimate, you can round some of the numbers involved - either the radius, or pi, or both.

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Q: What is the estimate circumference of a circle that has a radius of 11 m?

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Radius = circumference/2pi, in this case 69/2pi or 34.5/3.14, as near 11 cm as makes no difference.

Circumference not required, and in any case doesn't make sense for a radius of 11; it should be 69. A = pi x r x r = 121 pi = 380.12

circumference = 2*pi*11 = 69.115 inches to 3 dp

C = ~34.56 inches.

eleven (11) inches

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The circumference of a circle with a radius of 11 is: 69.12

The radius is 11.

A circle with a radius of 11 units has a circumference of 69.12 units.

The circumference of a circle with a radius of 11 is about 69.12The general formula is circumference = (2 x radius) x pi. Therefore, in this instance, the answer is 2 x 11 x pi = about 69.12.

Circumference = 2*pi*11 inches

The circumference of a circle with a radius of 11 is about 69.12 centimeters.The general formula is circumference = (2 x radius) x pi. Therefore, in this instance, the answer is 2 x 11 x pi = about 69.12

It is: 2*pi*11 yards

C = 69.115 inches.

It is a line, which is 11 inches long, from the circumference of a circle to its centre.

The circumference of a circle is the same as the perimeter of a circle, so the perimeter and circumference would both be 3 ft.

The formula for circumference is Radius X 2 X pi so for a radius of 11 meters is 11X2X3.1416= 69.12 (but because the accuracy of the radius measurement of 2 decimal places the answer is 69)

The answer depends on what the 11 m refers to radius, diameter or something else.