how is the value of pie determined?

Answer 1

The costs of the ingredients plus a mark-up depending on the taste of it.

Answer 2

In Euclidean geometry, pi is a constant which is defined as the the ratio between any circles circumference to its diameter.

pi= C/d or C/2r

It is estimated to be:
3.14159265358979323846264338327950288419716939937510 to the 50th decimal place.

To approximate pi, for any point (x,y) inside a circle of radius r where x and y are integers

sqrt(x^2+y^2)
summing all points inside a circle to get the area

pi= (1/r^2)*SUMxSUMy(1)

this approaches the true value of pi as r gets larger.

If you have graph paper, draw a circle and count the squares inside the circle as the area and the number of squares from the circle's center point to its edge as radius.

Pi= Area (number of squares)/Radius^2

Note: Pi is transcendental and imaginary and therefore can only be approximated by numerical methods.

Answer 3

Here's a straightforward do-it-yourself way, which is closest to the definition of pi.

Let C be a circle of diameter 1. Pi is the unique number which is greater than the perimeter of any polygon inscribed in C, and less than the perimeter of any polygon circumscribed about C. To perform such perimeter calculations in practice, it's convenient to take regular polygons. If you take regular polygons with 2^n sides, as n increases, you can use successive half-angle trig identities to get explicit expressions for the perimeters, involving successive square root-taking.

For example, if you take an inscribed square, you can conclude that pi is greater than 2 * sqrt(2), and thus greater than 2.8. If you take a circumscribed square, you can conclude that pi is less than 4. See how long it takes for you to conclude that pi is less than 22/7, or greater than 3.1.

Answer 4

There is a simple way to do it. A circle with a polygon inside and a polygon outside, find the average of the them and u have the circumference. divide by the diameter and u can calculate pi

Answer 5

I believe it is through a summation or product equation (the big sigma or the big Pi, symbols - Product is the same as summation except with multiplication instead of addition).

Answer 6

Pi is the ratio of a circle's circumference to its diameter; i.e. the circumference divided by the diameter.

Answer 7

Here is a website on pi...not 'pie'

Answer 8

Read this:

http://en.wikipedia.org/wiki/Pi

Answer 9

there are several formuli most common but slow one is

4* arctan(1)