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Подошла к концу олимпиада ЮМШ 🥇 Публикуем задачку, которая предлагалась в девятом классе 🔥
Задача. Дан вписанный выпуклый четырёхугольник 𝐴𝐵𝐶𝐷. Точки 𝑃, 𝑄, 𝑅, 𝑆 выбраны на прямых 𝐴𝐷, 𝐴𝐵, 𝐶𝐵, 𝐷𝐶 так, что 𝑃𝑄 ⊥ 𝐴𝐵, 𝑄𝑅 ⊥ 𝐵𝐶, 𝑅𝑆 ⊥ 𝐶𝐷 и 𝑆𝑃 ⊥ 𝐷𝐴. Оказалось, что четырёхугольники 𝑃𝑄𝑅𝑆 и 𝐴𝐵𝐶𝐷 (соответственно) подобны. Докажите, что центр описанной окружности четырёхугольника 𝑃𝑄𝑅𝑆 — это точка пересечения диагоналей 𝐴𝐵𝐶𝐷.
Подошла к концу олимпиада ЮМШ 🥇 Публикуем задачку, которая предлагалась в девятом классе 🔥
Задача. Дан вписанный выпуклый четырёхугольник 𝐴𝐵𝐶𝐷. Точки 𝑃, 𝑄, 𝑅, 𝑆 выбраны на прямых 𝐴𝐷, 𝐴𝐵, 𝐶𝐵, 𝐷𝐶 так, что 𝑃𝑄 ⊥ 𝐴𝐵, 𝑄𝑅 ⊥ 𝐵𝐶, 𝑅𝑆 ⊥ 𝐶𝐷 и 𝑆𝑃 ⊥ 𝐷𝐴. Оказалось, что четырёхугольники 𝑃𝑄𝑅𝑆 и 𝐴𝐵𝐶𝐷 (соответственно) подобны. Докажите, что центр описанной окружности четырёхугольника 𝑃𝑄𝑅𝑆 — это точка пересечения диагоналей 𝐴𝐵𝐶𝐷.
The company maintains that it cannot act against individual or group chats, which are “private amongst their participants,” but it will respond to requests in relation to sticker sets, channels and bots which are publicly available. During the invasion of Ukraine, Pavel Durov has wrestled with this issue a lot more prominently than he has before. Channels like Donbass Insider and Bellum Acta, as reported by Foreign Policy, started pumping out pro-Russian propaganda as the invasion began. So much so that the Ukrainian National Security and Defense Council issued a statement labeling which accounts are Russian-backed. Ukrainian officials, in potential violation of the Geneva Convention, have shared imagery of dead and captured Russian soldiers on the platform. At the start of 2018, the company attempted to launch an Initial Coin Offering (ICO) which would enable it to enable payments (and earn the cash that comes from doing so). The initial signals were promising, especially given Telegram’s user base is already fairly crypto-savvy. It raised an initial tranche of cash – worth more than a billion dollars – to help develop the coin before opening sales to the public. Unfortunately, third-party sales of coins bought in those initial fundraising rounds raised the ire of the SEC, which brought the hammer down on the whole operation. In 2020, officials ordered Telegram to pay a fine of $18.5 million and hand back much of the cash that it had raised. "Russians are really disconnected from the reality of what happening to their country," Andrey said. "So Telegram has become essential for understanding what's going on to the Russian-speaking world." The SC urges the public to refer to the SC’s I nvestor Alert List before investing. The list contains details of unauthorised websites, investment products, companies and individuals. Members of the public who suspect that they have been approached by unauthorised firms or individuals offering schemes that promise unrealistic returns That hurt tech stocks. For the past few weeks, the 10-year yield has traded between 1.72% and 2%, as traders moved into the bond for safety when Russia headlines were ugly—and out of it when headlines improved. Now, the yield is touching its pandemic-era high. If the yield breaks above that level, that could signal that it’s on a sustainable path higher. Higher long-dated bond yields make future profits less valuable—and many tech companies are valued on the basis of profits forecast for many years in the future.
from tw
