This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
This image shows some kind of formula that could be converted to TeX. Storing formulas as images makes it harder to change them. TeX also helps making sure that they all use the same font and size. A replacement has been proposed:
This image of simple geometry is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship.
Original upload log
The original description page was here. All following user names refer to en.wikipedia.
2008-06-14 00:53 Joey-das-WBF 23×21× (3797 bytes) Unicode Character from the [[Letterlike Symbols]] (2100–214F) block. Vector version of [[Image:U+2115.gif]].
Captions
Add a one-line explanation of what this file represents