Some details you may want to know: pi indicates the ratio of the circumference to the diameter in a circle; pi is irrational (you can't express it as the ratio of two integers) and trascendental (nor as the solution of a polynomial equation). Irrational also means that the digits won't repeat indefinitely. With trigonometric formulae and powerful computers, pi has already been calculated to over a billion digits. Knowing these digits, by itself, has no practical application.
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The number for pi is: 3.1415926535897932384626433832795
several equations' answers come out to 3.14 and so on, thats pi
Pi is important to the study of math because is can be used in many ways. For example, you can use it to find the circumference of a circle and the volume of a sphere. I am not really sure how people calculated that pi works for that, but it plays a big part in our math history.
who invented, or came up with "pi" in math? How did they come up with the estimation of 3.14?
Math Grade 9