Задача. В равнобедренном треугольнике 𝐴𝐵𝐶 (𝐴𝐵 = 𝐴𝐶 < 𝐵𝐶) на сторонах 𝐵𝐶 и 𝐴𝐵 отмечены точки 𝑃 и 𝑄 соответственно так, что 𝑃𝑄 перпендикулярно 𝐴𝐵 и 𝑃𝑄 делит периметр треугольника пополам. Докажите, что 𝐴𝐵 = 𝐵𝑃.
Задача. В равнобедренном треугольнике 𝐴𝐵𝐶 (𝐴𝐵 = 𝐴𝐶 < 𝐵𝐶) на сторонах 𝐵𝐶 и 𝐴𝐵 отмечены точки 𝑃 и 𝑄 соответственно так, что 𝑃𝑄 перпендикулярно 𝐴𝐵 и 𝑃𝑄 делит периметр треугольника пополам. Докажите, что 𝐴𝐵 = 𝐵𝑃.
And indeed, volatility has been a hallmark of the market environment so far in 2022, with the S&P 500 still down more than 10% for the year-to-date after first sliding into a correction last month. The CBOE Volatility Index, or VIX, has held at a lofty level of more than 30. Groups are also not fully encrypted, end-to-end. This includes private groups. Private groups cannot be seen by other Telegram users, but Telegram itself can see the groups and all of the communications that you have in them. All of the same risks and warnings about channels can be applied to groups. The Dow Jones Industrial Average fell 230 points, or 0.7%. Meanwhile, the S&P 500 and the Nasdaq Composite dropped 1.3% and 2.2%, respectively. All three indexes began the day with gains before selling off. "And that set off kind of a battle royale for control of the platform that Durov eventually lost," said Nathalie Maréchal of the Washington advocacy group Ranking Digital Rights. Right now the digital security needs of Russians and Ukrainians are very different, and they lead to very different caveats about how to mitigate the risks associated with using Telegram. For Ukrainians in Ukraine, whose physical safety is at risk because they are in a war zone, digital security is probably not their highest priority. They may value access to news and communication with their loved ones over making sure that all of their communications are encrypted in such a manner that they are indecipherable to Telegram, its employees, or governments with court orders.
from tr
