Задача. Окружности 𝑠₁ и 𝑠₂ касаются внешним образом. Их линия центров пересекает 𝑠₁ в точках 𝐴 и 𝑃, и пересекает 𝑠₂ в точках 𝐵 и 𝑃. Общая внешняя касательная касается 𝑠₁ и 𝑠₂ в точках 𝐴₁ и 𝐵₁ соответственно. Прямые 𝐴𝐴₁ и 𝐵𝐵₁ пересекаются в точке 𝑄. Докажите, что 𝑃𝑄 является общей касательной для 𝑠₁ и 𝑠₂.
Желаем вам больше приятных задач по геометрии и не только 📚
Задача. Окружности 𝑠₁ и 𝑠₂ касаются внешним образом. Их линия центров пересекает 𝑠₁ в точках 𝐴 и 𝑃, и пересекает 𝑠₂ в точках 𝐵 и 𝑃. Общая внешняя касательная касается 𝑠₁ и 𝑠₂ в точках 𝐴₁ и 𝐵₁ соответственно. Прямые 𝐴𝐴₁ и 𝐵𝐵₁ пересекаются в точке 𝑄. Докажите, что 𝑃𝑄 является общей касательной для 𝑠₁ и 𝑠₂.
Желаем вам больше приятных задач по геометрии и не только 📚
Although some channels have been removed, the curation process is considered opaque and insufficient by analysts. Multiple pro-Kremlin media figures circulated the post's false claims, including prominent Russian journalist Vladimir Soloviev and the state-controlled Russian outlet RT, according to the DFR Lab's report. WhatsApp, a rival messaging platform, introduced some measures to counter disinformation when Covid-19 was first sweeping the world. The company maintains that it cannot act against individual or group chats, which are “private amongst their participants,” but it will respond to requests in relation to sticker sets, channels and bots which are publicly available. During the invasion of Ukraine, Pavel Durov has wrestled with this issue a lot more prominently than he has before. Channels like Donbass Insider and Bellum Acta, as reported by Foreign Policy, started pumping out pro-Russian propaganda as the invasion began. So much so that the Ukrainian National Security and Defense Council issued a statement labeling which accounts are Russian-backed. Ukrainian officials, in potential violation of the Geneva Convention, have shared imagery of dead and captured Russian soldiers on the platform. On Telegram’s website, it says that Pavel Durov “supports Telegram financially and ideologically while Nikolai (Duvov)’s input is technological.” Currently, the Telegram team is based in Dubai, having moved around from Berlin, London and Singapore after departing Russia. Meanwhile, the company which owns Telegram is registered in the British Virgin Islands.
from tr
