the circumference of a circle is proportional to its diameter.the relationship can be expressed

πd = C.The ratio of circumference to diameter is a fixed constant.No matter how big or small the circle is, its circumference is always skipped by the ratio of diameter.3.3.14 is more accurate and sometimes approximates 22/7.More accurately, the value is:.3.1415926535.And it will never be repeated or terminated.The letter used to denote this value is the Greek letter " pi ", pronounced " pie "