Spiral of Theodorus Published -- Download video MP4 360p Recommendations 01:00 Alternating Geometric Series Sum 01:00 Approximate Square Roots with Calculus! 08:13 81 Math Symbols Explained 04:15 Trig Visualized: One Diagram to Rule them All (six trig functions in one diagram) 01:00 Don't let it fool you! (Link above explains what's happening) 06:19 Seven Proofs Without Words for Summing Cubes 01:00 Approximate Square Roots Visually! 06:00 Einstein's proof of Pythagoras theorem 05:43 Constructing Irregular Polygons