How do we know π is infinite and never repeats? Proving pi is irrational #PiDay
2:31
What is (-1)^π equal to?
23:20
Pi is IRRATIONAL: animation of a gorgeous proof
15:15
Calculating i to the power i the right way. Why every proof you have seen is wrong
18:07
18 year old students just discovered a proof of Pythagoras that mathematicians said was impossible
15:21
Why π^π^π^π could be an integer (for all we know!).
17:22
A Proof That The Square Root of Two Is Irrational
16:47
A Brief History of Pi
16:29