В четырёхугольнике ABCD ∠A = 90⁰, ∠B = 91⁰. Известно, что BC = AD. Пусть серединные перпендикуляры к отрезкам AB и CD пересекаются в точке Х. (!) ∠AXB = ?
В четырёхугольнике ABCD ∠A = 90⁰, ∠B = 91⁰. Известно, что BC = AD. Пусть серединные перпендикуляры к отрезкам AB и CD пересекаются в точке Х. (!) ∠AXB = ?
Russian President Vladimir Putin launched Russia's invasion of Ukraine in the early-morning hours of February 24, targeting several key cities with military strikes. Elsewhere, version 8.6 of Telegram integrates the in-app camera option into the gallery, while a new navigation bar gives quick access to photos, files, location sharing, and more. 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. If you initiate a Secret Chat, however, then these communications are end-to-end encrypted and are tied to the device you are using. That means it’s less convenient to access them across multiple platforms, but you are at far less risk of snooping. Back in the day, Secret Chats received some praise from the EFF, but the fact that its standard system isn’t as secure earned it some criticism. If you’re looking for something that is considered more reliable by privacy advocates, then Signal is the EFF’s preferred platform, although that too is not without some caveats. "And that set off kind of a battle royale for control of the platform that Durov eventually lost," said Nathalie Maréchal of the Washington advocacy group Ranking Digital Rights.
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