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Pi x the diameter of the circle will hive you the circumference. The diameter is double the radius so the answer to your question is pi2r.

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Q: How Do you find the circumfrence when you know the radius?
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Related questions

How do you find the radius of a circle if you know the circumfrence?

radius = circumference/(2*pi)


How do you find the radius of a circle if you don't have the area?

If you do not have the area, what do you have? The radius is half the diamiter The radius is PieR2 Worked backwards if you know the circumfrence.


How do you find the circumfrence of a circle if you have the radius?

the circumfrence of a circle is pi times it's radius squared.


How do you find the circumfrence of a circle with the radius?

two times the radius times pi


What is circumfrence and how do you find it?

The circumfrence is like a perimeter. It is the area around a circle. You can find the circumfrence of a circle by using this formula. Pi x R2 or Pi times the radius squared.


A bicycle wheel is about 26 inches in diameter find its radius circumference and area?

radius=13 area=40.82 circumfrence=8.28025477707


How do you find the circumfrence of a circle when you have the area?

Divide the area by pi then square root your answer which will give the radius of the circle and use 2*pi*radius to find the circumference.


What is the circumfrence of a circle with a radius of 6?

18.84


HOW DO YOU FIND THE CIRCUMFRENCE AND AREA OF A QUESTION?

If you mean of a circle then they are as follows:- Circumference = 2*pi*radius or diameter*pi Area = pi*radius squared


How do you find the radius when the circumfrence is given?

The circumference (not circumfrence!) is given by the equation C = 2*pi*r where r is the radius. So r = C/(2*pi) where pi is the irrational number that is approx 3.14159 or even more approximately, 3.14.


Given a circle with a radius of 4 which is the circumfrence?

25.1


What is the equation for circumfrence?

the radius squared x pi