Happy Tau Day!

If you like pie (an entire pie, that is, not half a pie) today is your day!

https://www.khanacademy.org/math/math-for-fun-and-glory/vi-hart/pi-tau/v/a-song-about-a-circle-constant

https://www.khanacademy.org/math/math-for-fun-and-glory/vi-hart/pi-tau/v/pi-is-still-wrong

https://tauday.com/tau-manifesto