Задача. На сторонах 𝐴𝐵 и 𝐴𝐶 треугольника 𝐴𝐵𝐶 выбраны точки 𝑃 и 𝑄 соответственно такие, что 𝐴𝑃 = 𝐴𝑄. На стороне 𝐵𝐶 выбраны точки 𝑅 и 𝑆 (𝐵𝑅 > 𝐵𝑆) таким образом, что ∠𝐵𝑅𝑃 = ∠𝐵𝑃𝑆 и ∠𝐶𝑆𝑄 = ∠𝐶𝑄𝑅. Докажите, что точки 𝑃, 𝑄, 𝑅, 𝑆 лежат на одной окружности.
Задача. На сторонах 𝐴𝐵 и 𝐴𝐶 треугольника 𝐴𝐵𝐶 выбраны точки 𝑃 и 𝑄 соответственно такие, что 𝐴𝑃 = 𝐴𝑄. На стороне 𝐵𝐶 выбраны точки 𝑅 и 𝑆 (𝐵𝑅 > 𝐵𝑆) таким образом, что ∠𝐵𝑅𝑃 = ∠𝐵𝑃𝑆 и ∠𝐶𝑆𝑄 = ∠𝐶𝑄𝑅. Докажите, что точки 𝑃, 𝑄, 𝑅, 𝑆 лежат на одной окружности.
But the Ukraine Crisis Media Center's Tsekhanovska points out that communications are often down in zones most affected by the war, making this sort of cross-referencing a luxury many cannot afford. Recently, Durav wrote on his Telegram channel that users' right to privacy, in light of the war in Ukraine, is "sacred, now more than ever." Official government accounts have also spread fake fact checks. An official Twitter account for the Russia diplomatic mission in Geneva shared a fake debunking video claiming without evidence that "Western and Ukrainian media are creating thousands of fake news on Russia every day." The video, which has amassed almost 30,000 views, offered a "how-to" spot misinformation. 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, which does little policing of its content, has also became a hub for Russian propaganda and misinformation. Many pro-Kremlin channels have become popular, alongside accounts of journalists and other independent observers.
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