2007-04-26 17:54:36 · 14 answers · asked by eddieshin54 1 in Science & Mathematics ➔ Mathematics
Pi is the result of comparing the diameter of a circle with its circumference: C/D=Pi.
Every perfect circle has the same ratio between its diameter and its circumference. Pi is most commonly expressed as 3.1416, but if you continued the math in the expression above, there is no end to the decimal places, kinda like 1/3 = .333333333333 etc.
2007-04-26 17:58:19 · answer #1 · answered by Stratman 4 · 0⤊ 0⤋
well, as it has already been mentioned, pi is the ratio of the circumference to the diameter of a circle, but the 3.14 comes from an extremely involved and complicated infinite series that is only solvable by calculus through a time consumign process, considering that there are no repeating patterns in pi. the process is too complicated to be outlined here,but here is a osurce for you to read all about it. best of luck!!! http://briantaylor.com/pi.htm
2007-04-27 01:08:28 · answer #2 · answered by Banjolick 1 · 0⤊ 0⤋
PI = Circumference of a circle divided by its diameter. Draw a circle with a compass and check the ration yourself. If you are exact in drawing and comparing, you will get a value around 3.14. Good luck.
2007-04-27 01:04:18 · answer #3 · answered by ¼ + ½ = ¾ 3 · 0⤊ 0⤋
In Euclidean plane geometry, Ï is defined as the ratio of a circle's circumference to its diameter:
Ï = c/d
Note that the ratio of c/d does not depend on the size of the circle. For example, if a circle has twice the diameter d of another circle it will also have twice the circumference c preserving the ratio c/d. This fact can also be stated as saying that all circles are similar.
Alternatively Ï can be also defined as the ratio of a circle's area to the area of a square whose side is the radius.
Ï = A/r^2
The constant Ï may be defined in other ways that avoid the concepts of arc length and area, for example as twice the smallest positive x for which cos(x) = 0.[2] The formulæ below illustrate other (equivalent) definitions.
see source for demonstration
2007-04-27 01:04:53 · answer #4 · answered by aquarian8502 2 · 0⤊ 0⤋
Pi is a mathematical constant, not a physical one.
It was calculated by mathematicians by trying to fit a circle between two polygons (one on the inside, one on the outside), increasing the number of edges to a very large number, so the circumference of each will get closer and closer to the circumference of the circle, and what they got was a an infinite series tha can be approximated by 3.141592...
2007-04-27 01:08:14 · answer #5 · answered by singlepun 3 · 0⤊ 0⤋
from experimental data.. they found that the perimeter of a circle divided by the diameter gives a constant of 3.14 or PI...
P = 2*PI*r = d*PI
PI = P/d = P/(2r)..
take any paper ( measure the top length)... fold into a cylinder with the measured side looking like circle (top of cylinder)...
now measure the diameter...
divide the first length (cirumfrance) by the diameter... you will get a number close to 3.14 ~3
2007-04-27 01:01:02 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Pi is the relationship between a circle's circumference (the distance around the circle) to it's diameter (distance across the circle). So if you measure the distance around the circle, and divide that by the diameter of the circle, you get 3.14159....
2007-04-27 01:01:38 · answer #7 · answered by mepeters3 1 · 0⤊ 0⤋
pi is not 22/7
pi is not rational so can never be written exactly as a number
pi is diameter of a circle / circumference of it
but to answers your main question
because
i mean it had to pick something why not 3.1415936...
2007-04-27 01:13:08 · answer #8 · answered by rioting_pacifist 2 · 0⤊ 1⤋
because it does? it is a ratio of the circumference of a circle to its diameter. it is just a physical constant, no one chose it (unless you think god did). so that's why
2007-04-27 00:59:16 · answer #9 · answered by Tim C 5 · 0⤊ 0⤋
Because if it were a different value, the Universe wouldn't function the way it does âº
Doug
2007-04-27 01:06:02 · answer #10 · answered by doug_donaghue 7 · 0⤊ 1⤋