What is the physical significance of Pi(3.147) .Why is it used in almost every formula?Who invented it?

Answer 1

Good questions.

*What is the physical significance of Pi?
The physical significance of Pi is that it is an irrational number (cannot be written as the ratio of two integers) and is transcendental (i.e. there is no polynomial with rational coefficients of which Pi is a root). An important consequence of the transcendence of Pi is the fact that it is not constructible. Because the coordinates of all points that can be constructed with compass and straightedge are constructible numbers, it is impossible to square the circle: that is, it is impossible to construct, using compass and straightedge alone, a square whose area is equal to the area of a given circle.

*Why is it used in almost every formula?
The number Pi appears routinely in equations describing fundamental principles of the universe, due in no small part to its relationship to the nature of the circle and, correspondingly, spherical coordinate systems. Pi is a constant in formulae to do with circles and spheres. E.g. Pi is defined as the ratio of a circle's circumference to its diameter,or as the ratio of a circle's area to the area of a square whose side is the radius.

*Who invented it?
Pi is not strictly speaking an invention. If anything, it is a discovery of something God created. Now onto the discovery. That the ratio of the circumference to the diameter of a circle is the same for all circles, and that it is slightly more than 3, was known to ancient Egyptian, Babylonian, Indian and Greek geometers. The Indians and Greeks also knew that the area of a circle is πr2, where r is the radius. But who assigned the name "Pi"? It would make sense that it is a Greek. There are much controversy, so I'll refer you to here as a starting point:
http://www.straightdope.com/mailbag/mpiorigin.html

Answer 2

The mathematical constant π is an irrational real number, approximately equal to 3.14159, which is the ratio of a circle's circumference to its diameter in Euclidean geometry, and has many uses in mathematics, physics, and engineering. It is also known as Archimedes' constant and as Ludolph's number.

History:

Often William Jones' book A New Introduction to Mathematics from 1706 is cited as the first text where the Greek letter π was used for this constant, but this notation became particularly popular after Leonhard Euler adopted it some years later (cf History of π).

Answer 3

Lilliana perhaps trying to answer in english is a good start.

Not invented discovered or calculated.

in 3 dimensional space (Height x width x depth) or 2 dimensional space (Height x width ) most calculations originate around a point and radiate outwards, plotting these radial points around the center produces a circle.

the area of a circle is found by pi x (r x r)

the radius of a circle is found by 2 x pi x r

the radius of a sphere is found by 4 x pi x (r x r)
(i think check wikipedia)
the area of a sphere is found by something else pi


What is the physical significance of Pi(3.147) no simple answer it just is i guess.
again see wikipedia for some more ...going now bye


most common used shapes in any form of calculation are circles asy they provide symetry from all angles

Answer 4

Pi= 3.141592... is the ratio of the diameter and the circumference lenght for a given circle and is the same for all circles (constant)
Its said ancient Greeks the first to arose the question.

Answer 5

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Answer 6

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