This file has source information, but it either links directly to the file or is a generic base URL, or is not an Internet source for a file that was likely found on the Internet. Source information should be provided so that the copyright status can be verified by others. It is requested that a better source be provided to make determination of the copyright information easier. Please provide a URL to an HTML page that contains this file. See Commons:Licensing#License_information for more information.
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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.