How it came to b in used in all meansuration calculations??y its value id fixed?
2007-11-18 20:20:28 · 13 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Pi or π is one of the most important mathematical constants, approximately equal to 3.14159, and represents the ratio of any circle's circumference to its diameter in Euclidean geometry. The number also represents the ratio of a circle's area to the square of its radius, and appears in many other formulas from mathematics and science. Pi is an irrational number, which means that its decimal expansion 3.1415926535897932... never ends or repeats.
2007-11-18 20:26:02 · answer #1 · answered by raindrops 5 · 0⤊ 1⤋
While calculating the circumference of a circle it was found that circumference is proportional to diameter of a circle. and value of that constant was given the name pie its value is 22/7
circumference / diameter = 22/7
2007-11-19 05:52:38 · answer #2 · answered by Pranil 7 · 0⤊ 0⤋
pi is a mathematical constant.
It is used to relate the length of the radius of a circle to its circumference, via the following:
circumference = 2 x pi x radius
or, put it another way, when a circle's diameter is 1, its circumference is pi.
pi is approximately 3.14159265 ....
It is an irrational number.
22/7 is just a convenient approximation to pi.
2007-11-19 04:29:45 · answer #3 · answered by jervois.east 2 · 0⤊ 0⤋
Ï is the ratio of circumference to diameter of a circle which is the same for all circles. It is an irrational number whose approximate value is 22/7.
2007-11-19 04:24:00 · answer #4 · answered by Madhukar 7 · 0⤊ 0⤋
The constant pi, denoted pi, is a real number defined as the ratio of a circle's circumference C to its diameter d==2r,
pi=C/d==C/(2r).
It is also sometimes called Archimedes' constant or Ludolph's constant.
It is equal to 3.141592653589793238462643383279502884197.
Therefore, if we substitute C=22 and d=7, we get C/d as 3.14.
2007-11-19 04:40:44 · answer #5 · answered by Anonymous · 1⤊ 0⤋
Ï is the letter pi of the greek alphabet. You may pronounce it "pie" wrongly (in Greek it sounds like pee) but that doesn't mean you should write pie as well.
As for the number, it is close to 22/7, but not equal, as Ï has been proven to never end (the decimals never end), so it cannot be expressed as a fractal.
2007-11-19 04:30:02 · answer #6 · answered by cpinatsi 7 · 0⤊ 0⤋
first of all pi is never equals to 22/7
well pi actual value is 3.1415926535897932384626433832795
and 22/7=3.1428571428571428571428571428571 is not equals to pi's value
however there is separate button available in scientific calculator for pi value....if pie=22/7 then y they gave us new button for pi value.....
2007-11-19 04:37:03 · answer #7 · answered by sunykk 1 · 0⤊ 0⤋
its the closest reasonable fraction to the actual number for pie. the reason that they use it for mensuration calculations, is that it is the best way to ensure that everyone uses the same numbers. say I calculate pie using 3.14 and I get one number and you calculate pie using 3.141592654 you would get a very similar number but it wouldn't be the same. so they use 22/7 so that everyone uses the same variable
2007-11-19 04:28:06 · answer #8 · answered by LifeOfTheParty2 2 · 0⤊ 0⤋
Ï is the circumference of a circle ÷ by its diameter. The size of circle does not matter, it stays the same fixed value.
2007-11-19 04:26:33 · answer #9 · answered by Namibian 2 · 0⤊ 0⤋
It is a basic rule in MATHS.
Pie is a math symbol ( л ) given a number that is equal to 22/7.
It is a constant
2007-11-19 05:02:56 · answer #10 · answered by Anonymous · 0⤊ 0⤋