I found How exactly do you measure circumference or diameter? but it was more related to how people measured circumference and diameter in old days.
BUT now we have a formula, but the value of PI cannot not be accurately determined, how can I find the accurately calculate the value of circumference of a circle?
Is there any other may be physical mean by which I can calculate the correct circumference?
thank you
Best Answer
We can pretend to measure the circumference of a circle by saying circumference = $\pi$ * diameter
Since $\pi$ itself is an approximation, a "measurement" of the circumference will always and forever be just an approximation and NEVER an exact number. It is quite interesting because one can clearly see a circle has bounds unlike a straight line which can be measured but can go on forever but a circle does not.
Quite mind boggling.