(pi) itself is an irrational number. The only multiples of it that can be rational are (pi) x (a rational number/pi) .
No, it is not.
No. pi/2 is a fraction but, since pi is irrational, so it pi/2.
Sometimes. The number '4' is real and rational. The number 'pi' is real but not rational.
The number "3.14159" by itself is rational, since it can be written as 314159/100000. However, the number pi (which is about 3.14159) is not rational, because it continues endlessly.
(pi) itself is an irrational number. The only multiples of it that can be rational are (pi) x (a rational number/pi) .
3.14 is a rational number pi is not. pi is not 3.14
It the radius is r then the area is pi*r*r - which is pi times a rational number. pi is an irrational number, so the multiple of pi and a rational number is irrational.
Minus pi. Or minus pi plus any rational number. Here is how you can figure this out (call your unknown number "x", and let "r" stand for any rational number):x + pi = r To solve for "x", simply subtract pi from both sides. That gives you: x = r - pi
No 22*pi is not a rational number
Any multiple of or addition to or subtraction from PI is an irrational number. PI divided by PI is 1, a rational number. So is PI times 0 = 0
No 10*pi is not a rational number because it can't be expressed as a fraction
No. pi/2 is a faction but it is not a rational number.
No 22*pi is not a rational number
No, it is not.
No.
Yes. For example, if you take any truncated equivalent of pi then it will be rational.