Tue, 29 May 2012
Prove πR² using only beads and a ruler!
Direct download: Proof_Without_Words-_The_Circle.mp4
Category:science & medicine -- posted at: 6:21pm EDT |
Tue, 29 May 2012
Prove πR² using only beads and a ruler!
Direct download: Proof_Without_Words-_The_Circle.mp4
Category:science & medicine -- posted at: 6:21pm EDT |