Pi 2 rational or irrational
- 2 pi rational or irrational number
- Pi over 2 rational or irrational
- Dfrac pi 2 rational or irrational
- Frac pi 2 rational or irrational
- Pi divided by 2 rational or irrational
- 2 pi r rational or irrational
- Pi minus 2 is rational or irrational
- Is negative 2 pi rational or irrational
- Is pi times 2 rational or irrational
- Is 2 plus pi rational or irrational
- 2 pi 3 is rational or irrational
- Is pi over 2 a rational or irrational number
- 2 into pi is rational or irrational
- Is 2 x pi rational or irrational