The formula is pi x the diameter of the circle, which is also pi x (2 x the radius)
C = pi * D
C = pi * 2r
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The circumference of a circle can be found using the equation c=2πr. For example, if a circle has a radius of 10, its circumference is 20π, or 62.832.
Divide the known circumference by pi to find the diameter of the circle.
To find the circumference of a circle in rhombus you eat SH*t .
To get the circumference of a circle, the equation is pi * diameter. So, in this case, it is 2.5 * pi (3.14), or roughly 7.85. So, the circumference of the circle is about 7.85 inches.
The circumference is: 32.1