Задача. На стороне 𝐵𝐶 параллелограмма 𝐴𝐵𝐶𝐷 отмечена точка 𝐸, а на стороне 𝐴𝐷 — точка 𝐹 так, что описанная окружность треугольника 𝐴𝐵𝐸 касается отрезка 𝐶𝐹 . Докажите, что описанная окружность треугольника 𝐶𝐷𝐹 касается прямой 𝐴𝐸.
Задача. На стороне 𝐵𝐶 параллелограмма 𝐴𝐵𝐶𝐷 отмечена точка 𝐸, а на стороне 𝐴𝐷 — точка 𝐹 так, что описанная окружность треугольника 𝐴𝐵𝐸 касается отрезка 𝐶𝐹 . Докажите, что описанная окружность треугольника 𝐶𝐷𝐹 касается прямой 𝐴𝐸.
Telegram does offer end-to-end encrypted communications through Secret Chats, but this is not the default setting. Standard conversations use the MTProto method, enabling server-client encryption but with them stored on the server for ease-of-access. This makes using Telegram across multiple devices simple, but also means that the regular Telegram chats you’re having with folks are not as secure as you may believe. If you initiate a Secret Chat, however, then these communications are end-to-end encrypted and are tied to the device you are using. That means it’s less convenient to access them across multiple platforms, but you are at far less risk of snooping. Back in the day, Secret Chats received some praise from the EFF, but the fact that its standard system isn’t as secure earned it some criticism. If you’re looking for something that is considered more reliable by privacy advocates, then Signal is the EFF’s preferred platform, although that too is not without some caveats. Messages are not fully encrypted by default. That means the company could, in theory, access the content of the messages, or be forced to hand over the data at the request of a government. Markets continued to grapple with the economic and corporate earnings implications relating to the Russia-Ukraine conflict. “We have a ton of uncertainty right now,” said Stephanie Link, chief investment strategist and portfolio manager at Hightower Advisors. “We’re dealing with a war, we’re dealing with inflation. We don’t know what it means to earnings.” 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.
from jp
