Задача. В параллелограмме 𝐴𝐵𝐶𝐷 точки 𝐸 и 𝐹 на отрезках 𝐴𝐷 и 𝐶𝐷 такие что ∠𝐵𝐶𝐸 = ∠𝐵𝐴𝐹. Точки 𝐾 и 𝐿 на отрезках 𝐴𝐷 и 𝐶𝐷 такие, что 𝐴𝐾 = 𝐸𝐷 и 𝐶𝐿 = 𝐹𝐷. Докажите, что ∠𝐵𝐾𝐷 = ∠𝐵𝐿𝐷.
Задача. В параллелограмме 𝐴𝐵𝐶𝐷 точки 𝐸 и 𝐹 на отрезках 𝐴𝐷 и 𝐶𝐷 такие что ∠𝐵𝐶𝐸 = ∠𝐵𝐴𝐹. Точки 𝐾 и 𝐿 на отрезках 𝐴𝐷 и 𝐶𝐷 такие, что 𝐴𝐾 = 𝐸𝐷 и 𝐶𝐿 = 𝐹𝐷. Докажите, что ∠𝐵𝐾𝐷 = ∠𝐵𝐿𝐷.
In 2018, Russia banned Telegram although it reversed the prohibition two years later. 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. As a result, the pandemic saw many newcomers to Telegram, including prominent anti-vaccine activists who used the app's hands-off approach to share false information on shots, a study from the Institute for Strategic Dialogue shows. Andrey, a Russian entrepreneur living in Brazil who, fearing retaliation, asked that NPR not use his last name, said Telegram has become one of the few places Russians can access independent news about the war.
from ye
