What is pi? I know it is 3. some thing,,,,,,,,,,,, the ratio of a circumference of a circle to its diameter?

Answer 1

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 (not to be confused with an Archimedes number) and as Ludolph's number.

In Euclidean plane geometry, π is defined either 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. The constant π may be defined in other ways that avoid the concepts of arc length and area, for example as twice the smallest positive x for which cos(x) = 0.
The numerical value of π truncated to 50 decimal places is:

3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510

Answer 2

Pi is the ratio of a circle's circumference to its diameter. With three significant digits it is 3.14. It is mostly used by engineers to calculate the area of a circle.

Answer 3

The formulas are for circumference: pi x diameter

for area: pi x radius^2

for volume of circle: 3/4 x pi x radius^3

also, its about 3.14 not 3. Just making sure you knew.

Answer 4

3.1415926535897932384626433832795 is the value of pi
or simply 3.14
you can check your computers calculator if you want, just click pi and it will appear
Circumference=2 X pi X radius
or
Circumference=pi X diameter

Answer 5

For most applications, Pi is equal to 3.14157.

Answer 6

It is 22/7 or in decimal representaion

3.142857142857142857...

Answer 7

pi is 3.14 and radius times two equals the diameter.

Answer 8

It means basically 3.141592654, and so on because it never ends

Answer 9

3.141592654

Answer 10

3.14