Radius, diameter, & circumference | Circles (article) | Khan Academy
Circles are all similar, and "the circumference divided by the diameter" produces the same value . In fact, however, there is a relationship between the terms. If you divide the circumference of any circle by its diameter, you always get pi. Relationship Between Diameter and Circumference. It we measure the circumference and diameter of various circles, we will find that the ratio of the circumference and their corresponding diameters is always.
Личный помощник директора отказывался верить ее словам. - Никогда не слышал.
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