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 ☀️
"Your messages about the movement of the enemy through the official chatbot … bring new trophies every day," the government agency tweeted. The Securities and Exchange Board of India (Sebi) had carried out a similar exercise in 2017 in a matter related to circulation of messages through WhatsApp. Telegram was co-founded by Pavel and Nikolai Durov, the brothers who had previously created VKontakte. VK is Russia’s equivalent of Facebook, a social network used for public and private messaging, audio and video sharing as well as online gaming. In January, SimpleWeb reported that VK was Russia’s fourth most-visited website, after Yandex, YouTube and Google’s Russian-language homepage. In 2016, Forbes’ Michael Solomon described Pavel Durov (pictured, below) as the “Mark Zuckerberg of Russia.” Perpetrators of these scams will create a public group on Telegram to promote these investment packages that are usually accompanied by fake testimonies and sometimes advertised as being Shariah-compliant. Interested investors will be asked to directly message the representatives to begin investing in the various investment packages offered. "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.
from cn
