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c = 2 pi r

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

What is the ratio of the circumference to the radius of the circle?

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


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

Radius of a circle = circumference/2*pi


What is the ratio of a circle's circumference called?

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.


How do you find ratio of a circumference?

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.


What is the ratio of a circle with a radius of 8cm?

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


Find the ratio of the circumference of 4Cm?

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


How did pi come about?

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.


What is the definition of cercumference and radius of pi.?

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.


What did Archimedes use to calculate pi?

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


Is it possible to draw a circle whose ratio of circumference to diameter is not pi?

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


What is circumference in terms of pi?

As pi is the ratio of the ratio of the circumference (C) of any circle to its diameter (d), the circumference of a circle in terms of pi is: C = pi x d The circumference of a circle is pi times its diameter or 2 pi times its radius (since a diameter is 2 times the radius).


Define pi and write a brief history of pi?

pi is the ratio between the radius and the circumference of the circle if the radius is 1 the circumference is pi