Задача. На сторонах 𝐴𝐵, 𝐵𝐶, 𝐶𝐴 треугольника 𝐴𝐵𝐶 выбраны точки 𝐶', 𝐴' и 𝐵' соответственно так, что 𝐴'𝐵'𝐶'𝐵 — параллелограмм. На отрезке 𝐴'𝐶' выбрана точка 𝐷 так, что углы 𝐴𝐵'𝐷 и 𝐵'𝐷𝐶' равны. Докажите, что прямая 𝐷𝐵' делит угол 𝐴𝐷𝐶 пополам.
Желаем вам, чтобы с каждым днём света в жизни становилось всё больше ☀️
Задача. На сторонах 𝐴𝐵, 𝐵𝐶, 𝐶𝐴 треугольника 𝐴𝐵𝐶 выбраны точки 𝐶', 𝐴' и 𝐵' соответственно так, что 𝐴'𝐵'𝐶'𝐵 — параллелограмм. На отрезке 𝐴'𝐶' выбрана точка 𝐷 так, что углы 𝐴𝐵'𝐷 и 𝐵'𝐷𝐶' равны. Докажите, что прямая 𝐷𝐵' делит угол 𝐴𝐷𝐶 пополам.
Желаем вам, чтобы с каждым днём света в жизни становилось всё больше ☀️
Such instructions could actually endanger people — citizens receive air strike warnings via smartphone alerts. For tech stocks, “the main thing is yields,” Essaye said. Messages are not fully encrypted by default. That means the company could, in theory, access the content of the messages, or be forced to hand over the data at the request of a government. Given the pro-privacy stance of the platform, it’s taken as a given that it’ll be used for a number of reasons, not all of them good. And Telegram has been attached to a fair few scandals related to terrorism, sexual exploitation and crime. Back in 2015, Vox described Telegram as “ISIS’ app of choice,” saying that the platform’s real use is the ability to use channels to distribute material to large groups at once. Telegram has acted to remove public channels affiliated with terrorism, but Pavel Durov reiterated that he had no business snooping on private conversations. Update March 8, 2022: EFF has clarified that Channels and Groups are not fully encrypted, end-to-end, updated our post to link to Telegram’s FAQ for Cloud and Secret chats, updated to clarify that auto-delete is available for group and channel admins, and added some additional links.
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