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The circumference of a circle is given by the formula C = 2πr where r is the radius.

But, as the diameter is 2 x radius then the formula can be written C = πd where d is the diameter.

In this example the circumference = 2π3 = 6π = 18.85 units.

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2010-01-22 23:38:26
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Q: What is the formula to find a circumference if the radius is 3 and the diameter is 6?
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Related questions

What is the formula to find circumference when you are given the radius?

To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi


How do you determine the circumference of a circle if you know the radius?

use the formula pi*diameter = circumference and the formula diameter = 2*radius and combine them 2pi*radius = circumference now you have a formula that you can just plug you numbers into. if you have 3 as your radius, then this is how to find the circumference 2pi*3=circumference 6.28*3=circumference 18.84=circumference


What formula do you use to find the radius diameter and circumference of a circle?

Radius is diameter divided by two. Diameter is radius times two or circumference divided by pi. Circumference is diameter times pi. Pi is roughly 3.14


What is the formula to find a circumference if the radius is 4 and the diameter is 8?

pie multiplied by the radius.


What is the formula for finding the diameter of a circle when the circumference is given?

the Circumference is pi times 2 times radius If you know circumference then you can find the radius. once you know the radius just multiply by 2 to find the diameter.


How do you find a circumference with a radius of 7.5?

Formula: Circumference=pi x diameter. As the diameter is always 2 x the radius, we get C = 2 * pi * radius = 47.124.


How do you find the diameter and then the circumference if you have the radius?

Diameter = radius * 2 Circumference = pi * diameter.


How do you find the formula for the circumference of a circle?

Circle's circumference = 2*pi*radius or diameter*pi


How do you find diameter and circumference?

Where C=circumference, r= radius and d=diameter To find circumference: C=2 x pi x r or you can use the formula C=pi x d To find diameter just multiply the radius by 2 if you know what the radius is. If you do not know the radius, but you know the circumference and need diameter use the following formula: C/pi=d Happy Computing!!!


How do you find the circumference if known the radius?

The formula for circumference is pi times diameter. Since a radius is always half the diameter, you just multiply it by 2 and then by pi.


What is the formula to find the circumference of a ciecle?

Diameter * 3.14159 or Radius * 2 * 3.14159


What formula will you use to find the circumference of a circle whose diameter is 2.2h?

Circumference of a circle = pi*diameter or 2*pi*radius

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