Any set that does not contain the number 1. For example,
even integers,
multiples of 3, or 4, or 5, ...
(0, 1)
{1/2, 2/3, 3/4, 4/5, ...}
{pi, pi2, pi3, ... }
No two numbers that can be completely written down with digits can be added, subtracted, multiplied, or divided to equal PI. If they could be divided to equal PI, then PI would be a rational number. But it isn't.
Pi divided by thirty two. .0981747704
It belongs to any set that contains it! For example, {-1.576}, or {45, sqrt(2), pi, -3/7, -1.576}, or numbers between -43 and 53, or rational numbers, or real numbers, or negative rational numbers, etc One set in particular that includes -1.576 is the set of rational numbers (ℚ).
25/pi = 7.957747155
the same as pi squared, which is 9.86960440109
No two numbers that can be completely written down with digits can be added, subtracted, multiplied, or divided to equal PI. If they could be divided to equal PI, then PI would be a rational number. But it isn't.
Yes, any positive number is a number that doesn't have a (-) behind it (-20; -23.67; -45.45454...), and is not zero (0). Any repeating number (see 3rd negative example) is irrational, no matter what its sign. Irrational numbers also include numbers (decimals, specifically) that don't repeat, but don't stop. Numbers that don't terminate include pi. Pi, as it is, is proof of a positive irrational number.
Any set that contains it! It belongs to {0.5}, or {45, sqrt(2), 0.5, pi, -3/7}, or multiples of 0.5, or square roots of 0.25, or counting numbers divided by 2, or rational numbers, or real numbers, or complex numbers, etc.
Yes, the digits of Pi are an infinite set. No, it is not possible to list the members of an infinite set.
3.14159265358979323... Rounded it's 3.14
pi is the circumference divided by the diameter. it is a set universal constant and will never change = 3.1415...
For any circle, pi (π) is the ratio of the circle's circumference (C) to its diameter (D) π=C/D
Pi is not a natural number. Natural numbers are just the regular set of numbers used for counting (1, 2, 3, 4, ...). Pi, being not even a whole number, is not natural.
pi is not divided into anything - unless you specify pi/2 or pi/3.6
No; here's a counterexample to show that the set of irrational numbers is NOT closed under subtraction: pi - pi = 0. pi is an irrational number. If you subtract it from itself, you get zero, which is a rational number. Closure would require that the difference(answer) be an irrational number as well, which it isn't. Therefore the set of irrational numbers is NOT closed under subtraction.
Pi is endless. Nobody can determine where the end is.
2