How do you get Pi?

Question

What are two numbers do i divide to get pi? Or the formula or whatever. I want to challenge my teacher to a pi off on march 14th. I need to know how to get over 50 numbers to beat him.

Answer 1

Pi is the ratio of the circimference of a circle to its diameter.

π = circumference / diameter

π = 3.141592654

- - - - - - - -s-

Answer 2

Hi:

You will need a computer to do that, Here some formulas for doing that

Pi= Sin( (360/n)/2)* n

or

Pi = Tan( (360/n)2*n

n= The Number of triangles or sides of a Polygon

for n be sure to use numbers between 1,000 to 1 *10^50 or better

This is the filling in the circle by triangles used by Archimedes

and

Pi = 4(1-1/3+1/5-1/7+1/9-1/11+....)
and

Pi= Sqr(6*( 1+ 1/4+1/9+1/16+1/25... 1/(n^2))

but this will take a while to get there

there are many more but those are the simplest to do

Check out My other answers on Pi
by Searching the Yahoo answer site

Good luck on PI Day and I hope you win

Answer 3

Take a plain thick hard paper board, a long non-elastic string, an ink pen, a pair of scissors, a geometric ruler and a pencil-fitted tight geometric compass. Then, follow the following steps:

1. Draw a circle on the paper board using the compass. Cautiously and accurately cut it out from the board using the scissors. Use the ink pen to mark the center.

2. Wind the string around the edge of the cut-out circle once completely. Use the ink pen at one place but marking on two spots of the same string (one on the part that is yet to encircle, the other on the part that has already encircled) to indicate both start and finish for one complete circle. You might do this step multiple times to eliminate human error.

3. Unwind the string, stretch it at the edge of the ruler to find the distance between the two marks. Note it down. This is your first number, let's say X, also called circumference of the circle.

4. Now place the rule on the circle making it's edge pass through the center spot that you had earlier marked. Measure the distance from one edge of the circle to the opposite in this condition. This gives you the second number, let's say Y, also called diameter. You might like to rotate the ruler on the circle, satisfying the condition, to take multiple measurements and use their average to eliminate errors.

5. Now Pi = X / Y. Use a computer or manually divide these two numbers upto the desired number of decimal places.

BINGO! This is the exact definition of Pi....you will find that the numbers after decimal point never follow a pattern and non-recurring.

Answer 4

6 3

Answer 5

Actually, you cannot find what you are looking for.
Pi is an irrational number. That is, it cannot be represented as a ratio or quotient of two integers.
But if you want a close approximation to pi, it's
22/7
It's not actually the closest. It's just the lowest approximation.

And the only simple formula for finding pi is
circumference of a circle divided by its radius

Any other formula will just lead you to its derivation.
And this is not just as simple as a area or volume formula.

But if you want a derivation, I'll give you one or two.
just inform me.

Answer 6

Pi is an "irrational" number, which by definition means you can't simply divide two other numbers to get it! Here it is to a few more than fifty places:

3.1415926535897932384626433

83279502884197169399375105

82097494459230781640628620

899862803482534211706798214

80865132823066470938446095

505822317253594081284811174

502841027019385211055596446

22948954930381964428810975

665933446128475648233786783

16527120190914564856692346

03486104543266482133936072

602491412737245870066063155

88174881520920962829254091715

364367892590360011330530

548820466521384146951941511609

Answer 7

u can use the following series:

(pi / 4) = 1-1/3+1/5-1/7+1/9-......ad inf.

so, pi = 4 times the above series.

the more terms u take, the better ur result wil be.

Answer 8

Pi is the ratio of a circle's circumference to its diameter.

Since an answer here is difficult to use expressions, use this link.
The algebraic expression is the easiest to use. It is commonly used in the tooling industry.

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

Answer 9

2 numbers r 22/7 or 3.14

Answer 10

draw any circle then measure the distance around it and divide that value by the measure of the diameter.