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The circumference of a circle is 3.14159… times, or pi times bigger than its diameter.
It is larger than the diameter by a factor of Pi (about 3.1416).
28 x 3.1416: circumference is pi times the diameter.
Well, the equation for finding the circumfrence of a circle is (diameter)(pi). That is diameter times pi. since the diameter of a circle is 2 radii, we can say that there is 2(pi) radii in a circle.
Infinity because the circumference of the circle is the same as the circumference of the sphere.