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.
But because group chats and the channel features are not end-to-end encrypted, Galperin said user privacy is potentially under threat. The next bit isn’t clear, but Durov reportedly claimed that his resignation, dated March 21st, was an April Fools’ prank. TechCrunch implies that it was a matter of principle, but it’s hard to be clear on the wheres, whos and whys. Similarly, on April 17th, the Moscow Times quoted Durov as saying that he quit the company after being pressured to reveal account details about Ukrainians protesting the then-president Viktor Yanukovych. The Securities and Exchange Board of India (Sebi) had carried out a similar exercise in 2017 in a matter related to circulation of messages through WhatsApp. Oh no. There’s a certain degree of myth-making around what exactly went on, so take everything that follows lightly. Telegram was originally launched as a side project by the Durov brothers, with Nikolai handling the coding and Pavel as CEO, while both were at VK. It is unclear who runs the account, although Russia's official Ministry of Foreign Affairs Twitter account promoted the Telegram channel on Saturday and claimed it was operated by "a group of experts & journalists."
from sa
