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The circumference of a circle is calculated using the following formula:
c = 2 π r
where:
c is the circumference
r is the radius
π is the constant of pi (3.14159....)
Since the radius is equal to half of the diameter, this formula can also be written as:
c = π d
Or, alternatively:
d = c / π
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What is the ratio of the circumference to the diameter for any circle?
The circumference of a circle is 3.14... times its diameter.circumference = diameter X pi
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).
What does the ratio of the value of pi come from?
Any circle's circumference divided by its diameter has a value of pi
Why is pi always 3.14?
Because pi is a constant. It is the ratio between the circumference and diameter of any circle (assuming it is a perfect circle).
What is the circumference of a 70yd diameter circle?
Circumference of any circle = (pi) x (diameter) Circumference of this particular circle = (pi) x (70 yd)
