The number for pi is: 3.1415926535897932384626433832795
3.141592653789 etc
half pi is 1/2 x 3.14 = 1.57
pi (literally and i dont mean the eating pie. by pi i mean in math it never ends)
In math terms, pi, means 3.14, which is a everlasting decimal, that is just rounded to make your math easier. So pi, means 3.14 in math terms.
Pi is when you multiply the diameter in a circle times 3.14. 3.14 = pi.
The term pi comes from the greek letter pi, which is the first letter of the word which in English is "perimeter".
Pi is a math word that begins with the letter "p". also Pythagorean theorem starts with p.
Pi=3.14 in basic math
If you mean behind a person's name it means Private Investigator. If you are referring to math PI=3.14159265359 ...
It isn't clear what you mean. I don't think that "pi form" is a commonly used math term.
That's the formula for the area of a circle.