Easy way to remember pi

[gary350]

No need! Just remember the fundamental theorem of Physics,$$\pi = e = \sqrt{g}$$

e = energy?

g = gravity?

 

[etotheipi]

$$e = \sum_{n=0}^\infty \frac{1}{n!} = \lim_{m\rightarrow \infty} \left(1+ \frac{1}{m} \right)^m \approx 2.718281828459045$$whilst $g$ is the gravitational field strength on the Earth's surface, which as pointed out by @Infrared must in this case be the dimensionless value of that quantity when expressed in the SI, to maintain dimensional homogeneity.

I might take this opportunity to mention that, in case anyone didn't notice, the fundamental theorem of Physics isn't particularly fundamental. Or a theorem, for that matter.

 

[Mark44]

e = energy?

g = gravity?

e is the Euler number, the base of the natural logarithm
g is the acceleration due to gravity (about $9.81 \frac{\text m}{\text{sec}^2}$ or about $32.2 \frac{\text {ft}}{\text{sec}^2}$)

 

[Mikestone]

There's an old poem about it.

Sir, I bear a rhyme excelling
In mystic verse and magic spelling
Celestial sprites elucidate
All my own striving can't relate

Just count the letters in each word.

 

[DennisN]

I remember how to press π on my calculator. Pi is ca 3 if my memory serves me.

 

[Astronuc]

I prefer this one