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you do this:rxrx3.14 in words radius times radius times 3.14 first times the radius by itself then multiply
* * * * *
The formula given in the above answer is for the area of a circle, not its circumference!
Circumference = 2*pi*r or pi*d where r is the radius, d = 2*r is the diameter
and pi is the irrational number which is approximately equal to 3.14159.
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How do you find the diameter and then the circumference if you have the radius?
Diameter = radius * 2 Circumference = pi * diameter.
How can you find the diameter and the radius if the circumference is given?
Diameter = circumference/pi Radius = circumference/2*pi
How do you find the radius of a circle is you have the circumference?
pi X diameter finds the circumference so circumference divided by pi will leave the diameter. half the diameter to find the radius
How to find the radius of a circle with the circumference?
Divide circumference by pi, that gives diameter. Radius is half of diameter
How do you find the length of of the radius of a circle?
You can either measure it, or calculate it if you know the diameter (radius = diameter / 2), or the circumference (radius = circumference / (2pi)).
