The Circumference (C) of a circle will ALWAYS be 3.1415926 times its Diameter (D).
This irrational number (which goes on forever) is called "pi".
C = pi x D
This will work for any circle, because as the circle gets bigger or smaller, so does the circumference by the same scale.
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To find the circumference of a circle, you can use the formula C = πd, where C is the circumference, π is a constant approximately equal to 3.14159, and d is the diameter of the circle. Given that the diameter of the circle is 69mm, you can substitute this value into the formula: C = π * 69mm ≈ 216.769mm. Therefore, the circumference of the circle is approximately 216.769mm.
The circumference of a circle with a diameter of 25 is: 78.54
If the diameter of a circle is 9 the circumference is: 28.3
If a circle has a diameter of 2.25, the circumference is: 7.069
The circumference of a circle with a diameter of 51m is: 160m