Задача. В треугольнике 𝐴𝐵𝐶 проведена медиана 𝐵𝑀. На касательной в точке 𝐶 к описанной окружности треугольника 𝐵𝑀𝐶 отмечена точка 𝐷 так, что ∠𝐶𝐵𝐷 = 90°. Отрезки 𝐴𝐷 и 𝐵𝑀 пересекаются в точке 𝐸. Докажите, что центр описанной окружности треугольника 𝐵𝐷𝐸 лежит на прямой 𝐴𝐶.
Задача. В треугольнике 𝐴𝐵𝐶 проведена медиана 𝐵𝑀. На касательной в точке 𝐶 к описанной окружности треугольника 𝐵𝑀𝐶 отмечена точка 𝐷 так, что ∠𝐶𝐵𝐷 = 90°. Отрезки 𝐴𝐷 и 𝐵𝑀 пересекаются в точке 𝐸. Докажите, что центр описанной окружности треугольника 𝐵𝐷𝐸 лежит на прямой 𝐴𝐶.
But because group chats and the channel features are not end-to-end encrypted, Galperin said user privacy is potentially under threat. 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. The picture was mixed overseas. Hong Kong’s Hang Seng Index fell 1.6%, under pressure from U.S. regulatory scrutiny on New York-listed Chinese companies. Stocks were more buoyant in Europe, where Frankfurt’s DAX surged 1.4%. "He has to start being more proactive and to find a real solution to this situation, not stay in standby without interfering. It's a very irresponsible position from the owner of Telegram," she said. Multiple pro-Kremlin media figures circulated the post's false claims, including prominent Russian journalist Vladimir Soloviev and the state-controlled Russian outlet RT, according to the DFR Lab's report.
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