Q: What is the circumference of a circle if the radius is 9 cm?

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

Doubling the radius doubles the circumference.

18 pi

Circumference of the circle: 2*pi*9 = 18*pi cm

If a circle has a circumference of 18pi, the radius is 9.

Related questions

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

Doubling the radius doubles the circumference.

18 pi

If radius of a circle is 9 centimeters the circumference would be: 56.55 cm (r x 2 x Pi = circumference).

Circumference of the circle: 2*pi*9 = 18*pi cm

A circle with a radius of 9 inches has a circumference of 56.55 inches.

If a circle has a circumference of 18pi, the radius is 9.

The radius is 1.43

Circumference = 2Π• radius 2Π•9 = (18×Π)"≈ 56.5"

A circle with a radius of 9 inches has a circumference of 56.55 inches and a diameter of 18 inches.

The circumference of a circle that is 9 cm wide is: 28.274 cm

The radius is about 1.432 units.