45:27

Constructibility 2: Intro to Field Extensions

28:42

Geometry Constructions (15 Must Know Types) with Compass and Straightedge

16:53

The problem Euclid couldn't solve

11:48

'My jaw is dropped': Canadian official's interview stuns Amanpour

48:45

Constructibility 5: Gauss' Construction of Regular 17 gon

15:24

Romanian Mathematics Olympiad

31:51

Visualizing quaternions (4d numbers) with stereographic projection

11:16

Impossible Geometry Problems: Trisecting Angle, Doubling Cube, Squaring Circle