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Новый год - новая задача! :)

Еще один забавный факт про описанный четырехугольник. Тут можно найти короткое хитрое решение в строчку. А можно утонуть в счете и прийти в никуда...

Окружность с центром I вписана в четырёхугольник ABCD.
(!) IAIC + IBID = sqrt(ABBCCDDA)



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Новый год - новая задача! :)

Еще один забавный факт про описанный четырехугольник. Тут можно найти короткое хитрое решение в строчку. А можно утонуть в счете и прийти в никуда...

Окружность с центром I вписана в четырёхугольник ABCD.
(!) IAIC + IBID = sqrt(ABBCCDDA)

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In addition, Telegram's architecture limits the ability to slow the spread of false information: the lack of a central public feed, and the fact that comments are easily disabled in channels, reduce the space for public pushback. "Like the bombing of the maternity ward in Mariupol," he said, "Even before it hits the news, you see the videos on the Telegram channels." As such, the SC would like to remind investors to always exercise caution when evaluating investment opportunities, especially those promising unrealistically high returns with little or no risk. Investors should also never deposit money into someone’s personal bank account if instructed. Given the pro-privacy stance of the platform, it’s taken as a given that it’ll be used for a number of reasons, not all of them good. And Telegram has been attached to a fair few scandals related to terrorism, sexual exploitation and crime. Back in 2015, Vox described Telegram as “ISIS’ app of choice,” saying that the platform’s real use is the ability to use channels to distribute material to large groups at once. Telegram has acted to remove public channels affiliated with terrorism, but Pavel Durov reiterated that he had no business snooping on private conversations. Ukrainian forces have since put up a strong resistance to the Russian troops amid the war that has left hundreds of Ukrainian civilians, including children, dead, according to the United Nations. Ukrainian and international officials have accused Russia of targeting civilian populations with shelling and bombardments.
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