Telegram Group & Telegram Channel
а) Пусть 4 окружности на плоскости касаются друг друга по циклу (внешним образом). Доказать, что точки касания лежат на одной окружности.

б) То же не на плоскости, а на сфере.

в) Вывести отсюда предыдущую задачу.

// по мотивам обсуждения в комментариях



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а) Пусть 4 окружности на плоскости касаются друг друга по циклу (внешним образом). Доказать, что точки касания лежат на одной окружности.

б) То же не на плоскости, а на сфере.

в) Вывести отсюда предыдущую задачу.

// по мотивам обсуждения в комментариях

BY Геометрия-канал


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But because group chats and the channel features are not end-to-end encrypted, Galperin said user privacy is potentially under threat. During the operations, Sebi officials seized various records and documents, including 34 mobile phones, six laptops, four desktops, four tablets, two hard drive disks and one pen drive from the custody of these persons. READ MORE Telegram has become more interventionist over time, and has steadily increased its efforts to shut down these accounts. But this has also meant that the company has also engaged with lawmakers more generally, although it maintains that it doesn’t do so willingly. For instance, in September 2021, Telegram reportedly blocked a chat bot in support of (Putin critic) Alexei Navalny during Russia’s most recent parliamentary elections. Pavel Durov was quoted at the time saying that the company was obliged to follow a “legitimate” law of the land. He added that as Apple and Google both follow the law, to violate it would give both platforms a reason to boot the messenger from its stores. Unlike Silicon Valley giants such as Facebook and Twitter, which run very public anti-disinformation programs, Brooking said: "Telegram is famously lax or absent in its content moderation policy."
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