Очень красивая задача с командной олимпиады сеньоров с Колма, который идет прямо сейчас. Биссектрисы AA1, BB1, CC1 неравнобедренного треугольника ABC пересекаются в точке I. Впи- санная окружность треугольника ABC касается стороны BC в точке A2. Окружность ωa проходит через точки A1, A2 и середину отрезка AI. Окружности ωb и ωc определяются аналогично. Докажите, что центры окружностей ωa, ωb, ωc лежат на одной прямой.
Очень красивая задача с командной олимпиады сеньоров с Колма, который идет прямо сейчас. Биссектрисы AA1, BB1, CC1 неравнобедренного треугольника ABC пересекаются в точке I. Впи- санная окружность треугольника ABC касается стороны BC в точке A2. Окружность ωa проходит через точки A1, A2 и середину отрезка AI. Окружности ωb и ωc определяются аналогично. Докажите, что центры окружностей ωa, ωb, ωc лежат на одной прямой.
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. 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. "This time we received the coordinates of enemy vehicles marked 'V' in Kyiv region," it added. In 2018, Russia banned Telegram although it reversed the prohibition two years later. "For Telegram, accountability has always been a problem, which is why it was so popular even before the full-scale war with far-right extremists and terrorists from all over the world," she told AFP from her safe house outside the Ukrainian capital.
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