I've seen $\tau$ on a title of a YouTube video and I need help knowing what the value is. I'm serious. I've never heard of the value. So, what is it? Also, is it rational or irrational (this part might be a bit off-topic, but I do know that $\pi$ is famous)? I think it's irrational. Just tell me what you think! Also, I've seen in one of Wikipedia's articles that $\tau$ is pronounced as \taf\ in Greek.
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$\begingroup$$\tau\equiv\dfrac{C}{R}=2\pi$. See tauday.comIt is a symbol used by $\tau$ists that define $\tau$ to be the true circle constant.
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