Задача 59: Автор - Пётр Ким Источник - Южный Математический Турнир 2024
В треугольнике ABC w - вписанная окружность. B-полувписанная окружность пересекает C-полувписанную окружность в точке X. Оказалось, что X лежит вне w. Из X провели касательные k и l к w. Доказать, что существует окружность, касающаяся k и l и проходящая через B и C.
Задача 59: Автор - Пётр Ким Источник - Южный Математический Турнир 2024
В треугольнике ABC w - вписанная окружность. B-полувписанная окружность пересекает C-полувписанную окружность в точке X. Оказалось, что X лежит вне w. Из X провели касательные k и l к w. Доказать, что существует окружность, касающаяся k и l и проходящая через B и C.
"The result is on this photo: fiery 'greetings' to the invaders," the Security Service of Ukraine wrote alongside a photo showing several military vehicles among plumes of black smoke. Telegram boasts 500 million users, who share information individually and in groups in relative security. But Telegram's use as a one-way broadcast channel — which followers can join but not reply to — means content from inauthentic accounts can easily reach large, captive and eager audiences. Ukrainian forces have since put up a strong resistance to the Russian troops amid the war that has left hundreds of Ukrainian civilians, including children, dead, according to the United Nations. Ukrainian and international officials have accused Russia of targeting civilian populations with shelling and bombardments. The channel appears to be part of the broader information war that has developed following Russia's invasion of Ukraine. The Kremlin has paid Russian TikTok influencers to push propaganda, according to a Vice News investigation, while ProPublica found that fake Russian fact check videos had been viewed over a million times on Telegram. The account, "War on Fakes," was created on February 24, the same day Russian President Vladimir Putin announced a "special military operation" and troops began invading Ukraine. The page is rife with disinformation, according to The Atlantic Council's Digital Forensic Research Lab, which studies digital extremism and published a report examining the channel.
from us
