2006-06-13 07:07:21 · 24 answers · asked by Lisa V 1 in Education & Reference ➔ Primary & Secondary Education
3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679
8214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196
4428810975665933446128475648233786783165271201909145648566923460348610454326648213393607260249141273
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2006-06-13 07:14:24 · answer #1 · answered by Anonymous · 0⤊ 0⤋
PI is the universal standard ratio of a circles diameter to circumference. And it is relative to a world of calculations
based upon circles. It's origin is a bit vague, but one interesting
example of discovery is the Egyptian one. They felt they
were being overtaxed for fertile land, where the two long sides of a "not so square" parcel were multiplied to calculate area for
taxation. They determined how to figure out an area of a circle
by putting a stake in the middle of a circle, attaching a rope to it,
drawing the circle, and then laying the rope in the groove they had drawn to determine how many lengths of the rope (which represented the radius) it would take to go around the circumference of the circle.. They came close to the 3.14
we now accept as the standard.
2006-06-13 07:32:14 · answer #2 · answered by Jeffrey S 1 · 0⤊ 0⤋
Pi can be calculated in various ways and in ways that permit infinite precision (i.e. we can know Pi to as many digits as we want). In that sense, the actual answer is that Pi is equal (exactly) to the output of some calculation when this calculation is allowed to run indefinitely (with infinite precision).
This means that although we don't know the exact SEQUENCE (we can't know all digits) we do know exactly the value of Pi because for all practical purposes we can generate as many digits of Pi as we want.
If you are curious, Pi is approximately 3.1415926535897932384 and this kind of precision is enough for computations in the galactic scale.
An easy, but slow, way to calculate Pi is :
Pi/4=1-1/3+1/5-1/7+1/9-... (etc)
2006-06-13 07:16:57 · answer #3 · answered by Pepinos 3 · 0⤊ 0⤋
Pi is the ratio of the circumference of a circle to it's diameter. pi = C/ D. It is an irrational number and so can be calculated to any number of decimal places, but never can be represented by a decimal or fraction exactly. It has been calculated to many thousands of decimal places by computers. In any practical physical experiment, pi only needs to be used to the same accruacy as the measured numbers in the experiment.
2006-06-13 07:26:07 · answer #4 · answered by John D 1 · 0⤊ 0⤋
Pi is an irrational number (non-terminating, non-repeating decimal) that has many applications in mathematics. The most common use of pi is in determining circumference (2*pi*radius) or area (pi*(radius^2)) of a circle. Although pi is written as a symbol, it is not a variable - similar to the constants e or rho.
2006-06-13 07:18:42 · answer #5 · answered by jborgy10 2 · 0⤊ 0⤋
By definition, pi is the ratio of the circumference of a circle to its diameter. You can use 3.14159, which is really pretty good, but if you want a better approximation you can use a computer to get it. Here's pi to many more digits: 3.14159265358979323846.
The area of a circle is pi times the square of the length of the radius, or "pi r squared":
A = pi*r^2
2006-06-13 07:14:33 · answer #6 · answered by rainman_long 1 · 0⤊ 0⤋
Pi is an irrational number that continues infinitly as far as we can tell, 3.1415926535897932384626433832795028841and it equals about 22/7. It is most commenly explained as the ratio of the circumference to the diameter of a circle, but it can also be used for calculations with DNA, a rainbow, ripples from rain drops, waves.
2006-06-13 07:29:23 · answer #7 · answered by Amy M 2 · 0⤊ 0⤋
pi is the ratio of a circle's circumference to it's diameter and is roughly about 22/7. it is an irrational number. that means as you continue the process of working out the quotient through long division the numbers never end or repeat in any pattern, so the exact number may never be known.
2006-06-13 07:14:18 · answer #8 · answered by bulldog5667 3 · 0⤊ 0⤋
in math, it is the ratio of the circumference of a circle to its diameter. The ratio for all circles and is approximately 3.14. However this is just an approximation, pi is actually an infinatly long number.
2006-06-13 07:14:13 · answer #9 · answered by Anonymous · 0⤊ 0⤋
pi is a transcendental number and has an infinite number of digits. if you are interested, the "joy of pi" book by David Blatner has a great history of pi
2006-06-13 07:26:08 · answer #10 · answered by ♪ ♫ ☮ NYbron ☮ ♪ ♫ 6 · 0⤊ 0⤋
PI is the ratio between the circumference of a circle and its diameter.
2006-06-13 07:21:11 · answer #11 · answered by atti2de1977 1 · 0⤊ 0⤋