Circumference of a circle: pi times diameter
The equation for finding the circumference of a circle is diameter times pi so reverse it to circumference divided by pi which leaves the diameter. The diameter is twice as big as the radius so divide the diameter by 2 and you will find the radius.
To find the circumference of a circle, you need only know the radius or diameter of the circle. The circumference of a circle is calculated as 2 x Pi x radius OR Pi x diameter. Pi is approximately 3.1415926.
circumference = pi*diameter
The diameter is the circumference divided by pi.
If you know the diameter and need the circumference you times the diameter of the circle by 3.14 also known as pie. That is how you get the circumference by only knowing the diameter. :)
Circumference of a circle: pi times diameter
to find the diameter of a circle when you only have the circomference you: divide the circomference by pi (approx. 3.14)
The equation for finding the circumference of a circle is diameter times pi so reverse it to circumference divided by pi which leaves the diameter. The diameter is twice as big as the radius so divide the diameter by 2 and you will find the radius.
circumference = diameter x pi (pi = 3.14159265 or 3.14 for rough approximation)
If you have only the diameter to get the circumference you have to multiply the circumference by pi: 3.14
To find the circumference of a circle, you need only know the radius or diameter of the circle. The circumference of a circle is calculated as 2 x Pi x radius OR Pi x diameter. Pi is approximately 3.1415926.
circumference = pi*diameter
If you only have a given diameter you have to multiply the diameter by Pi (3.142) or 3.14 and then you get the circumference!
Divide the circumference by Pi.
The diameter is the circumference divided by pi.
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