Answer: Thus every circle has an infinite number of radii. This is because the number of points on the circumference of the circle is infinite. So there can be an infinite number of lines joining them to the center. If we are placing 2 radii end-to-ending a circle, then we would have the same length as the diameter. The diameter is equal to twice the measure of the radius. \pi (Pi) is the ratio of the circumference of a circle to its diameter. It is an irrational number that is approximately equal to 3.14. The radius of a circle is the distance from the center of the circle to the edge of the circle.
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