This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
This math image could be re-created using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}.
It is recommended to name the SVG file “Mirrors make isometries 2005-07-08.svg”—then the template Vector version available (or Vva) does not need the new image name parameter.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the licence, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible licence as the original.
{{cc-by-sa-2.5}} PNG file created as SVG, rendered by Batik, and uploaded by author. Illustration of how Euclidean plane isometries (reflection, translation, rotation, and glide reflection) can be made with a series of mirrors.