User talk:2A02:C7F:B10D:E700:C547:CF17:1F84:A3C

February 2021
Hello, I'm DVdm. I noticed that you added or changed content in an article, Regular polygon, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at the tutorial on citing sources. If you think I made a mistake, you can leave me a message on my talk page. Thank you. - DVdm (talk) 16:51, 24 February 2021 (UTC)

Please do not add or change content, as you did at Monogon, without citing a reliable source. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Thank you. - DVdm (talk) 18:29, 24 February 2021 (UTC)