Next: 10.1 Formulas for Symmetries in Cartesian Coordinates
Up: Part II: Three-Dimensional Geometry
Previous: 9.5 Homogeneous Coordinates in Space



10 Space Symmetries or Isometries

A transformation of space (invertible map of the plane to itself) that preserves distances is called an isometry of space. Every isometry of space is of one of the following types:

The identity is a particular case of a translation and of a rotation; rotations are particular cases of screw motions; and reflections are particular cases of glide-reflections. However, as in the plane case, is more intuitive to consider each case separately.




Next: 10.1 Formulas for Symmetries in Cartesian Coordinates
Up: Part II: Three-Dimensional Geometry
Previous: 9.5 Homogeneous Coordinates in Space



[HOME] The Geometry Center Home Page

Silvio Levy
Wed Oct 4 16:41:25 PDT 1995

This document is excerpted from the 30th Edition of the CRC Standard Mathematical Tables and Formulas (CRC Press). Unauthorized duplication is forbidden.