Дан треугольник ABC из каждой вершины провели красную и синию прямые, которые симметричны относительно биссектрис соответствующих углов. Оказалось, что они образовали два не равных треугольника с общим ортоцентром. Докаите, что описанные окружности этих треугольников имеют общую точку на описанной окружности исходного.
Дан треугольник ABC из каждой вершины провели красную и синию прямые, которые симметричны относительно биссектрис соответствующих углов. Оказалось, что они образовали два не равных треугольника с общим ортоцентром. Докаите, что описанные окружности этих треугольников имеют общую точку на описанной окружности исходного.
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. Asked about its stance on disinformation, Telegram spokesperson Remi Vaughn told AFP: "As noted by our CEO, the sheer volume of information being shared on channels makes it extremely difficult to verify, so it's important that users double-check what they read." The last couple days have exemplified that uncertainty. On Thursday, news emerged that talks in Turkey between the Russia and Ukraine yielded no positive result. But on Friday, Reuters reported that Russian President Vladimir Putin said there had been some “positive shifts” in talks between the two sides. In a message on his Telegram channel recently recounting the episode, Durov wrote: "I lost my company and my home, but would do it again – without hesitation." To that end, when files are actively downloading, a new icon now appears in the Search bar that users can tap to view and manage downloads, pause and resume all downloads or just individual items, and select one to increase its priority or view it in a chat.
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