Нехай 𝐴𝐿 — бісектриса трикутника 𝐴𝐵𝐶, 𝑂 — центр кола, описано го навколо цього трикутника, 𝐷 та 𝐸 — середини 𝐵𝐿 та 𝐶𝐿 відповідно. На відрізках 𝐴𝐷 та 𝐴𝐸 відмітили точки 𝑃 та 𝑄 так, що 𝐴𝑃𝐿𝑄 паралелограм. Доведіть, що 𝑃𝑄 ⟂ 𝐴𝑂.
Нехай 𝐴𝐿 — бісектриса трикутника 𝐴𝐵𝐶, 𝑂 — центр кола, описано го навколо цього трикутника, 𝐷 та 𝐸 — середини 𝐵𝐿 та 𝐶𝐿 відповідно. На відрізках 𝐴𝐷 та 𝐴𝐸 відмітили точки 𝑃 та 𝑄 так, що 𝐴𝑃𝐿𝑄 паралелограм. Доведіть, що 𝑃𝑄 ⟂ 𝐴𝑂.
Emerson Brooking, a disinformation expert at the Atlantic Council's Digital Forensic Research Lab, said: "Back in the Wild West period of content moderation, like 2014 or 2015, maybe they could have gotten away with it, but it stands in marked contrast with how other companies run themselves today." In the United States, Telegram's lower public profile has helped it mostly avoid high level scrutiny from Congress, but it has not gone unnoticed. "For Telegram, accountability has always been a problem, which is why it was so popular even before the full-scale war with far-right extremists and terrorists from all over the world," she told AFP from her safe house outside the Ukrainian capital. In addition, Telegram's architecture limits the ability to slow the spread of false information: the lack of a central public feed, and the fact that comments are easily disabled in channels, reduce the space for public pushback. Telegram users are able to send files of any type up to 2GB each and access them from any device, with no limit on cloud storage, which has made downloading files more popular on the platform.
from fr
