Please I need clarification: What's the value of Pi

Saudi Arabia
July 23, 2010 1:03pm CST
Some of my friends said Pi = 22/7, but I believed they were wrong. Pls who's right? I or them?
14 responses
• Hungary
1 Nov 10
You can find more methods here: http://reference.wolfram.com/legacy/v5_2/Demos/Notebooks/CalculatingPi.html
@zannnie (109)
• Hungary
1 Nov 10
great answer! :) konstantinus!
• Hungary
1 Nov 10
You can also compute Pi in excel with this method. Generate numbers from 1 to 1000 in column A: 1, 2, 3, and so on, 1000 and then generate their square in column B: 1*1, 2*2, 3*3, and so on, 1000*1000 and then generate their reciprocal in column C: 1/(1*1), 1/(2*2), 1/(3*3),...,1/(1000*1000) calculate the sum of the numbers in column C, then multiply by 6, and then extract the square root. it will yield an approximate value of Pi If you use more then 1000 numbers (eg. 50000) you will get more and more precise value of Pi. You used this equation: inf sum (1/n^2) = Pi*Pi/6 1
@zannnie (109)
• Hungary
1 Nov 10
this one looks complicated, but good answer too! Thank you!
• India
23 Jul 10
Both of you are right. The exact value of Pi is known by none. 22/7 is somewhat near to it. 3.145________. is an inacurrate value with never ending decimals and the shorter version of it, 3.14 is used for calculations. Basically, Pi is the common ratio for the arcs and diameters for all circles.
• Saudi Arabia
23 Jul 10
Nice one! You're really The King Man. Welcome to mylot!
@lacieice (2065)
• United States
23 Jul 10
Pi is 3.141593. It never ends or repeats, and it cannot be expressed properly as a fraction.
• Saudi Arabia
23 Jul 10
Correct! That's it. Thank you so much
@nxwkev (244)
• United States
23 Jul 10
22/7 is a approximation so both of you are right. PI is not exactly that but it is close.
• Saudi Arabia
23 Jul 10
Alright. That's what they don't know and think that's the exact value. Thank you for your nice contribution and happy mylotting!
• India
23 Jul 10
Pi refers to 22/7 or 3.14 sometimes as 180degree depends upon the condition in which it is used.
• Saudi Arabia
23 Jul 10
Thank you for your response. I know 22/7 or 3.14 are approximations, but the seem not to know this fact. They maintained that's the value, just in the sense of equality and not approximation. In fact, 22/7 is one of the least accurate estimates for Pi. 355/113, 333/106 are even closer to Pi than 22/7 Thanks and enjoy mylotting!
@boymelvs (138)
• Philippines
22 Aug 10
pi is the ratio of circumference of a circle to its diameter. 3.14 or 22/7 are both accepted in mathematics as constant value of pi. but if you want much accurate solution try to rely on the formula.
@bkrm_gupt (220)
• India
29 Jul 10
According to me the value of pie is 3.14
@ashton77 (292)
• India
24 Jul 10
The first thing that comes to our mind when we say Pi is 22/7.Generally people refers Pi=22/7, beacause that will make the work easy. The value of Pi= 3.141592........infinity. Remembering Pi as 22/7 would make the calculation easier.
@mimiang (3777)
• Philippines
24 Jul 10
3.14
@venkit (2957)
• India
24 Jul 10
its 22/7 whats wrong in it?
@BethannTT (222)
23 Jul 10
Pi is approx 3.141592654
@pinky31ps (329)
• India
23 Jul 10
well dude, we don't have accurate value of pi. its estimated value is 3.14. when we dont want to complicate the calculation, we use 22/7. its just like that. simple..
@tap0991 (2767)
• United States
23 Jul 10
That is the correct estimate pi as a fraction. The only thing wrong about the fraction is fractions do not always express the whole amount to the desirable decimal. Pi has been calculated up to 1 million decimal places and I believe it is still growing. Here is the first 10,000 decimal places-http://www.math.utah.edu/~pa/math/pi.html Here is up to 8 million-http://andyslife.org/misc/Pi%20to%208M%20places/pi-8M.php