User talk:2600:1700:DF20:7AC0:A1E2:477B:5F22:98D4

Hello, I'm Rtbittaker. I noticed that you added or changed content in an article, Isosceles triangle, 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. If you need guidance on referencing, please see the referencing for beginners tutorial, or if you think I made a mistake, you can leave me a message on my talk page. Thank you.