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Q: What is the ratio of the circumference of a circle to its radius?

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The ratio of the circumference to the radius of the circle is 2 times pi

Radius of a circle = circumference/2*pi

The ratio of a circle's circumference to its area is called the reciprocal of half the radius. The ratio of the circumference to its radius is called two times pi.

It depends on the ratio of what of the circle? Its circumference, diameter, area?

The answer depends on what the ratio is relative to!The ratio of a circumference to the area of a circle is half the radius.

The ratio of the circumference of a circle with radius 4 cm to its area is 1:2.

It was inititially recognised as the ratio between the radius and circumference of a perfect circle. The radius times "Pi" equals the circumference of a perfect circle.

The ratio of the circumference of a circle to its radius.

c = 2 pi r

Circumference is the enclosing boundary of a curved geometric figure, especially a circle. Radius is a straight line from the center to the circumference of a circle or sphere. Pi is the numerical value of the ratio of the circumference of a circle to its diameter and does not have a circumference or radius of its own.

No, the circumference divided by the radius will always be pi for a circle.

The radius of a circle is circumference/2 pi .

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