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 ☀️
The Russian invasion of Ukraine has been a driving force in markets for the past few weeks. However, the perpetrators of such frauds are now adopting new methods and technologies to defraud the investors. 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." In the past, it was noticed that through bulk SMSes, investors were induced to invest in or purchase the stocks of certain listed companies. At its heart, Telegram is little more than a messaging app like WhatsApp or Signal. But it also offers open channels that enable a single user, or a group of users, to communicate with large numbers in a method similar to a Twitter account. This has proven to be both a blessing and a curse for Telegram and its users, since these channels can be used for both good and ill. Right now, as Wired reports, the app is a key way for Ukrainians to receive updates from the government during the invasion.
from ua
