Please answer ive learn't about pi and i now its used to find out the volume of shapes such circles etc but where did the formula originate?
2006-08-11 21:53:04 · 12 answers · asked by chabz 1 in Education & Reference ➔ Higher Education (University +)
hey hey thats cheating,
should do your sch work yourself ;P
2006-08-11 22:03:46 · answer #1 · answered by Abarai 3 · 0⤊ 0⤋
Pi is a constant, like the speed of light. It is determined by observation.
A formula which approximates Pi to two decimal places is 22/7.
Pi is actually 3.141593 to 6 dp, and you could go on further if you want more accuracy.
It is also the length of the circumference of a circle (in units of measurement) with diameter equal to 1 unit of measurement.
2006-08-11 22:05:32 · answer #2 · answered by James 6 · 0⤊ 0⤋
I believe Archimedes was one of the first to calculate Pi to 3 decimal places.
Ancient mathematicians approach to calculating pi was to draw polygons with more and more sides to them inside circles, so that the areas of the polygons(which could be computed) would more and more closely approach the area of the circle.
The Chinese were very succesful using this methed calculating Pi to 10 dp.
Only powerful computers can calculate Pi accurately to billions of decimal places, but the best approximation is 355/113
2006-08-11 22:05:59 · answer #3 · answered by Peakey 3 · 0⤊ 0⤋
You calculate it by very accurate measuring, but much easier to use tables or the built in function on calculators or computers. 22/7 is quite accurate also.
The name 'pi' originated in ancient Greece, those people were the first to use it or discover it, or the first ones to name it.
2006-08-11 22:13:21 · answer #4 · answered by Chris cc 1 · 0⤊ 0⤋
The circumference of a circle = Its diameter * Pi
This is a constant ration and any attempt to derive it by measuring it will not be very accurate.
Usually it is sufficient to know that it is 3.14159
2006-08-11 22:03:41 · answer #5 · answered by Martin G 4 · 0⤊ 0⤋
pi is the ratio between circumference and diameter. It is not 3.13, it is 3.14159 etc., it is a irrational number so goes on forever with no pattern.
2006-08-11 22:05:36 · answer #6 · answered by kingpaulii 4 · 0⤊ 0⤋
i think it is the ratio of the circumference of a circle to its radius. you divide one by the other and you always get pi.
Cheers glen for the correction, pls forgive me but it is a sat morning and im having an argument with my hangover.
2006-08-11 21:56:42 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Circumfrenece to diameter (not radius)
http://en.wikipedia.org/wiki/Image:Diameter_and_Pi_1.gif
2006-08-11 22:01:46 · answer #8 · answered by Glen G 2 · 0⤊ 0⤋
Look *** hole it's 22/7 = 3.142857 recurring where the hell did you get 3.13??? dumb ***.
2006-08-11 22:02:40 · answer #9 · answered by va3jrj 2 · 0⤊ 0⤋
what the first reply said
2006-08-11 22:00:01 · answer #10 · answered by Dyno 1 · 0⤊ 0⤋