general/spherical-trigonometry

Geometry of figures on the surface of a sphere

Formula for the great-circle distance between two points on a sphere

Quaternion of norm 1 (unit quaternion)

Relation between the side lengths and angles of a spherical triangle

Formula for the great-circle distance between two points on a sphere

Geometry of figures on the surface of a sphere

Formula for the great-circle distance between two points on a sphere

Geometry of figures on the surface of a sphere

Spherical triangle that can be used to tile a sphere

Problem of finding unknown lengths and angles of a triangle

Formula for the great-circle distance between two points on a sphere

Geometry of figures on the surface of a sphere

Formula for the great-circle distance between two points on a sphere

Geometry of figures on the surface of a sphere