Ditching the Fifth Axiom - Numberphile
11:49
Fifth Axiom (extra footage) - Numberphile
13:45
A Problem with the Parallel Postulate - Numberphile
7:17
The History of Non-Euclidean Geometry - Sacred Geometry - Part 1 - Extra History
9:55
58 and other Confusing Numbers - Numberphile
12:42
We (could) live on a 4D Pringle (Non-Euclidean Geometry and the shape of the Universe)
10:54
Non-Euclidean Geometry Explained - Hyperbolica Devlog #1
9:24
Parabolas and Archimedes - Numberphile
10:23