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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=Ï€D)

Therefore the ratio of Circumference to Diameter is π:1.

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โˆ™ 2012-01-20 05:47:37
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Q: What can you say about the ratio of circumference to the diameter of the circles?
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Related questions

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

How will derive the value of pi?

the value of pi can be derived as the ratio between the circumference and diameter of every circle, say pi = circumference/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.

What is the relationship between the circumference of a circle and its diameter?

The circumference of a circle is equal to pi times its diameter. Another way to say this is that for any circle, circumference divided by diameter will always have pi as the answer, regardless of the size of the circle.

How do you you calculation the diameter with circumferance?

The formula for circumference is Pi x D= Circumference. If you know the circumference you solve for the diameter as you would any other variable. Let's say the circumference is 10, the equation would then be: Pi (3.14) x D = 10. Solve for D. D= 10/3.14

If you double the diameter of a circle what happens to the circle's circumference?

I would think it would double also. Say Circle A has a diameter of 1 inch and Circle B has a diameter of 2 inches. To get the circumference, you multiply the diameter by pi (3.14). So 1 x 3.14 = 3.14 so that is the circumference of Circle A. To get the circumference of Circle B you need to multiply 2 x 3.14 = 6.28. And 6.28 is twice 3.14 so I would think the circumference doubles.

What is the widthof a circle 14 feet in circumference?

When you say width, I think you mean diameter 14 = pi x diameter diameter = 14/pi = 14/3.1415 = 4.456 feet

What is the diameter of 84?

This is missing some information. For instance, it does not say what 84 is. Is it the radius, the circumference? See the link below for a step by step guide to finding a diameter.

How do you get a circumference of a circle?

to get the circumference of a circle you must multiply pi times diameter so say the circle's diameter was 8, you would do you 8 x pi (3.14 in this case) = 25.12 . that would be the circumference. the formula is circumference = pi (3.14) x diameter ! here's some extra information, to get the area of a circle you have to multiply pi and the radius of the circle squared. so say the circles radius is 2, then you have to square 3 which is 9. to square a number you have to take that number and multiply it by itself , in this case i did 3x3 to get the radius squared. OK, so now that i have the radius squared you need to multiply it by pi. which is 3.14 , so 9 x 3.14 = 28.26 the formula is area = pi x radius squared.

What is the circumference of a circle with a radius of 4 inches?

The formula for finding the circumference is the diameter times pi because the radius is half of the diameter, the diameter of this circle would be 8 8 times pi equals approximately 25.1327 Or you could leave it in terms of pi and say 8pi (using the symbol)

What is an example of circumference?

A cicumference is the perimeter or distance around the edge of a circle. To get the circumference you use the following equation: C=πd (3.1416 x diameter) where n = pi and is always 3.1416 Example: Say you have a circle with the diameter of 2 in. (diameter of circle)x(pi)= 2 in. x 3.1416 = 6.2832 So the circumference of a circle with a diameter of 2 in. is 6.2832 which means the circle is 6.2832 in. around the outside edge.

What is diameter if the circumference of a circle is 324 pie cm squared?

Perhaps you meant to say area? Circumference is a linear quantity, cm squared is an area. diameter = 2 x sqrt 324 = 36cm Circumference is 2 x pi x 18 and area is pi x 18 x 18

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