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The ratio is called pi and it is an irrational number which is approx equal to 3.14159

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Q: What is the ratio of a circle's circumference C to its diameter D?
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What is the retationship between the circumference and the diameter?

What is the relationship between the circumference and the diameter? Answer The circumference divided by pi gives the diameter. d = C / pi An alternate way to express the above answer. For all circles, pi is the ratio of the circumference to the diameter pi = C / d


What can you say about the ratio of circumference to the diameter of the circles?

For any size circle, the ratio of the circumference to the diameter is constant. This constant is known as pi, an irrational number which is approximately equal to 3.1416.Since the Circumference is pi times Diameter. (C=πD)Therefore the ratio of Circumference to Diameter is π:1.


What is the ratio of PI circles?

In a circle Pi it the ratio of the circumference to the diameter. That is to say, if C is the cirumference and D is the diamter of any circle, we have: Pi=C/D


What do we call the ratio of a circle's circumference to its diameter?

Pi is the ratio of circumference to diameter. C/d=pi always!!!


The ratio of a circle circumference to its diameter?

C = pi x D is the ratio of a circle's circumference to its diameter.


The ratio of the circumference of a circle to its diameter roughly equal to 3.141592?

Circumference (C) = diameter (D) times pi (3.141592) is the ratio of the circumference of a circle to its diameter.


Why is pi used to measure circles?

Pi is the ratio of the circumference ( the perimeter) of a circle to its diameter. You might have learned in school that if C is the circumference of the circle., then C=2Pir or C=pixd from which we say pi = C/d or the ratio of the circumference of the circle to its diameter. This has been known since ancient times! William Jones gave us the symbol we currently use for it. This comes from the 16th letter in the Greek alphabet. So we use it to measure circles because of what it is.


How does Pi relate to the circumference and area of circles?

One definition of pi is the ratio of the circumference, C, of a circle to its diameter.,d. pi=C/d The area of a circle is (pi)r2 or (pi)d2/4 where r is the radius.


How do you get a circumference and diameter with pi?

Pi represents the ratio of the circumference of a circle to its diameter. If you know the diameter (D), then the circumference (c) is (D) *pi. If you know the circumference (C), then the diameter (D) is (C)/pi. circumference is 2PiRR is the radius.so 2R is twice the radius (a.k.a. The Diameter)That leaves you withCircumference=Diameter*PiThe circumference can be found by multiplying the diameter by pi, and the diameter can be found by dividing the circumference by pi.


Was does Pi equall?

It is the ratio of the circumference (C) and the diameter (D) of a circle. Using pi and the diameter of a circle, you can work out the circumference.


What is the relationship between circumference and pi?

In any circle, the product of pi and the diameter will be the circumference. That is because pi is the ratio of the diameter of a circle to its circumference. Here is the equation: c = pi x d


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).