Нехай 𝐼 та 𝑂 — центри вписаного та описаного кіл прямокутного трикутника 𝐴𝐵𝐶 (∠𝐶 = 90°), 𝐾 — точка дотику вписаного кола з 𝐴𝐶, а 𝑃 та 𝑄 — точки перетину описаного кола трикутника 𝐴𝑂𝐾 з 𝑂𝐶 та з описаним колом трикутника 𝐴𝐵𝐶 відповідно. Доведіть, що точки 𝐶, 𝐼, 𝑃 та 𝑄 лежать на одному колі.
Нехай 𝐼 та 𝑂 — центри вписаного та описаного кіл прямокутного трикутника 𝐴𝐵𝐶 (∠𝐶 = 90°), 𝐾 — точка дотику вписаного кола з 𝐴𝐶, а 𝑃 та 𝑄 — точки перетину описаного кола трикутника 𝐴𝑂𝐾 з 𝑂𝐶 та з описаним колом трикутника 𝐴𝐵𝐶 відповідно. Доведіть, що точки 𝐶, 𝐼, 𝑃 та 𝑄 лежать на одному колі.
Asked about its stance on disinformation, Telegram spokesperson Remi Vaughn told AFP: "As noted by our CEO, the sheer volume of information being shared on channels makes it extremely difficult to verify, so it's important that users double-check what they read." One thing that Telegram now offers to all users is the ability to “disappear” messages or set remote deletion deadlines. That enables users to have much more control over how long people can access what you’re sending them. Given that Russian law enforcement officials are reportedly (via Insider) stopping people in the street and demanding to read their text messages, this could be vital to protect individuals from reprisals. On December 23rd, 2020, Pavel Durov posted to his channel that the company would need to start generating revenue. In early 2021, he added that any advertising on the platform would not use user data for targeting, and that it would be focused on “large one-to-many channels.” He pledged that ads would be “non-intrusive” and that most users would simply not notice any change. The Russian invasion of Ukraine has been a driving force in markets for the past few weeks. He floated the idea of restricting the use of Telegram in Ukraine and Russia, a suggestion that was met with fierce opposition from users. Shortly after, Durov backed off the idea.
from es
