Pi approximation day 2026: Pi square is nearly g and other coincidences

This will be the last article about \(\pi\) for this year, but I could not miss today, given that \(\pi \approx 22/7\) and in most countries of the world today’s date is 22/7, the pi approximation day. In the spirit of approximations, and to continue the other article let’s discuss about the \(\pi^2 \approx g\) were \(g\) is the acceleration due to gravity at sea level on Earth. Read more...