Universal Hyperbolic Geometry B (33- ) by Norman J Wildberger

source: njwildberger       2017年1月23日

32:14 33: Spherical and elliptic geometries: an introduction
44:19 34: Spherical and elliptic geometries (cont.)
32:14 35: Areas and volumes for a sphere
34:48 36: Classical spherical trigonometry
31:54 37: Perpendicularity, polarity and duality on a sphere
38:43 38: Parametrizing and projecting a sphere
33:08 39: Rational trigonometry: an overview
31:20 40: Rational trigonometry in three dimensions
42:24 41: Trigonometry in elliptic geometry
40:58 42: Trigonometry in elliptic geometry II
33:38 43: Applications of rational spherical trigonometry I
42:33 44: Applications of rational spherical trigonometry II
19:41 45: The geometry of the regular tetrahedron
24:49 46: Eight ninths and the geometry of A4 paper
26:07 47: The remarkable Platonic solids I
31:18 48: The remarkable Platonic solids II: symmetry
27:13 49: Canonical structures inside the Platonic solids I
23:30 50: Canonical structures inside Platonic solids II
22:25 51: Canonical structures inside the Platonic solids III
26:25 52: Petrie polygons of a polyhedron
27:59 53: The classification of Platonic solids I