[remix] vihart's "a song about a circle constant" Published 12 years ago • 14K plays • Length 3:40 Download video MP4 Download video MP3 Similar videos 3:49 a song about a circle constant 3:51 vihart - a song about a circle constant 2:41 vi hart: a song about a circle constant: half tau day remix 11:12 tau vs pi smackdown - numberphile 9:42 tau replaces pi - numberphile 5:17 pi is (still) wrong.