В равнобедренном треугольнике ABC, AB = BC. Точка D на BC такова, что верно равенство углов: DAB = BAC. Точки X и Y на AB и BC соответственно таковы, что AX : XB = 2 : 1 и BY : YC = 2 : 1. Доказать, что отражение D относительно XY лежит на AC.
В равнобедренном треугольнике ABC, AB = BC. Точка D на BC такова, что верно равенство углов: DAB = BAC. Точки X и Y на AB и BC соответственно таковы, что AX : XB = 2 : 1 и BY : YC = 2 : 1. Доказать, что отражение D относительно XY лежит на AC.
Channels are not fully encrypted, end-to-end. All communications on a Telegram channel can be seen by anyone on the channel and are also visible to Telegram. Telegram may be asked by a government to hand over the communications from a channel. Telegram has a history of standing up to Russian government requests for data, but how comfortable you are relying on that history to predict future behavior is up to you. Because Telegram has this data, it may also be stolen by hackers or leaked by an internal employee. On Feb. 27, however, he admitted from his Russian-language account that "Telegram channels are increasingly becoming a source of unverified information related to Ukrainian events." The original Telegram channel has expanded into a web of accounts for different locations, including specific pages made for individual Russian cities. There's also an English-language website, which states it is owned by the people who run the Telegram channels. As the war in Ukraine rages, the messaging app Telegram has emerged as the go-to place for unfiltered live war updates for both Ukrainian refugees and increasingly isolated Russians alike. It is unclear who runs the account, although Russia's official Ministry of Foreign Affairs Twitter account promoted the Telegram channel on Saturday and claimed it was operated by "a group of experts & journalists."
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