The irrational Pi,
fascinated many a rational guy.
From the time of Babylon,
its importance grew on and on.
Needed in geometry,
but very crucial in trigonometry.
Some physical constants depend on it:
The period of the pendulum uses it,
and Planck’s reduced constant is a function of it.
Even the speed of light,
can be expressed as
a power of it.
As you can see,
amongst numbers,
the status of Pi
is incredibly high.