Простая, но тем не менее довольно красивая задача.
Даны треугольник ABC и произвольная точка P. Пусть Ha, Hb, Hc – ортоцентры треугольников BPC, APC, APB соответственно. (!) Площади треугольников ABC и HaHbHc равны.
Простая, но тем не менее довольно красивая задача.
Даны треугольник ABC и произвольная точка P. Пусть Ha, Hb, Hc – ортоцентры треугольников BPC, APC, APB соответственно. (!) Площади треугольников ABC и HaHbHc равны.
"There is a significant risk of insider threat or hacking of Telegram systems that could expose all of these chats to the Russian government," said Eva Galperin with the Electronic Frontier Foundation, which has called for Telegram to improve its privacy practices. "He has kind of an old-school cyber-libertarian world view where technology is there to set you free," Maréchal said. Some people used the platform to organize ahead of the storming of the U.S. Capitol in January 2021, and last month Senator Mark Warner sent a letter to Durov urging him to curb Russian information operations on Telegram. 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. After fleeing Russia, the brothers founded Telegram as a way to communicate outside the Kremlin's orbit. They now run it from Dubai, and Pavel Durov says it has more than 500 million monthly active users.
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