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Подошел к концу третий день турнира Колмогорова, и мы, как обычно, радуем вас задачами с него 💥
Задача. На сторонах 𝐵𝐶, 𝐶𝐴 и 𝐴𝐵 треугольника 𝐴𝐵𝐶 выбраны точки 𝐴₁, 𝐵₁ и 𝐶₁ соответственно. Четырёхугольники 𝐴𝐵₁𝐴₁𝐶₁, 𝐵𝐶₁𝐵₁𝐴₁ и 𝐶𝐴₁𝐶₁𝐵₁ описаны около окружностей с центрами 𝐼𝑎, 𝐼𝑏 и 𝐼𝑐 соответственно. Докажите, что площади треугольников 𝐴₁𝐵₁𝐶₁ и 𝐼𝑎𝐼𝑏𝐼𝑐 отличаются в четыре раза.
Подошел к концу третий день турнира Колмогорова, и мы, как обычно, радуем вас задачами с него 💥
Задача. На сторонах 𝐵𝐶, 𝐶𝐴 и 𝐴𝐵 треугольника 𝐴𝐵𝐶 выбраны точки 𝐴₁, 𝐵₁ и 𝐶₁ соответственно. Четырёхугольники 𝐴𝐵₁𝐴₁𝐶₁, 𝐵𝐶₁𝐵₁𝐴₁ и 𝐶𝐴₁𝐶₁𝐵₁ описаны около окружностей с центрами 𝐼𝑎, 𝐼𝑏 и 𝐼𝑐 соответственно. Докажите, что площади треугольников 𝐴₁𝐵₁𝐶₁ и 𝐼𝑎𝐼𝑏𝐼𝑐 отличаются в четыре раза.
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. In February 2014, the Ukrainian people ousted pro-Russian president Viktor Yanukovych, prompting Russia to invade and annex the Crimean peninsula. By the start of April, Pavel Durov had given his notice, with TechCrunch saying at the time that the CEO had resisted pressure to suppress pages criticizing the Russian government. In December 2021, Sebi officials had conducted a search and seizure operation at the premises of certain persons carrying out similar manipulative activities through Telegram channels. The regulator took order for the search and seizure operation from Judge Purushottam B Jadhav, Sebi Special Judge / Additional Sessions Judge. Pavel Durov, Telegram's CEO, is known as "the Russian Mark Zuckerberg," for co-founding VKontakte, which is Russian for "in touch," a Facebook imitator that became the country's most popular social networking site.
from kr
