Обобщение задачи из @geom_mega. Красные точки X и X' инверсны относительно описанной окружности треугольника ABC. Зеленая гипербола изогональна прямой XX' Докажите, что гипербола XX'ABC проходит через изогональное сопряжение центра зеленой гиперболы.
Обобщение задачи из @geom_mega. Красные точки X и X' инверсны относительно описанной окружности треугольника ABC. Зеленая гипербола изогональна прямой XX' Докажите, что гипербола XX'ABC проходит через изогональное сопряжение центра зеленой гиперболы.
What distinguishes the app from competitors is its use of what's known as channels: Public or private feeds of photos and videos that can be set up by one person or an organization. The channels have become popular with on-the-ground journalists, aid workers and Ukrainian President Volodymyr Zelenskyy, who broadcasts on a Telegram channel. The channels can be followed by an unlimited number of people. Unlike Facebook, Twitter and other popular social networks, there is no advertising on Telegram and the flow of information is not driven by an algorithm. One thing that Telegram now offers to all users is the ability to “disappear” messages or set remote deletion deadlines. That enables users to have much more control over how long people can access what you’re sending them. Given that Russian law enforcement officials are reportedly (via Insider) stopping people in the street and demanding to read their text messages, this could be vital to protect individuals from reprisals. "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. "This time we received the coordinates of enemy vehicles marked 'V' in Kyiv region," it added. Despite Telegram's origins, its approach to users' security has privacy advocates worried.
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