Разминка дня №35 (авторская, мордовский муницип 10.3):
Дана трапеция ABCD с основаниями AB и CD такая, что AC перпендикулярно CD. E на BC такова, что ∠DAC = ∠CAE. BD пересекает AC в точке F. Докажите, что EF || CD.
Разминка дня №35 (авторская, мордовский муницип 10.3):
Дана трапеция ABCD с основаниями AB и CD такая, что AC перпендикулярно CD. E на BC такова, что ∠DAC = ∠CAE. BD пересекает AC в точке F. Докажите, что EF || CD.
In February 2014, the Ukrainian people ousted pro-Russian president Viktor Yanukovych, prompting Russia to invade and annex the Crimean peninsula. By the start of April, Pavel Durov had given his notice, with TechCrunch saying at the time that the CEO had resisted pressure to suppress pages criticizing the Russian government. Pavel Durov, Telegram's CEO, is known as "the Russian Mark Zuckerberg," for co-founding VKontakte, which is Russian for "in touch," a Facebook imitator that became the country's most popular social networking site. Unlike Silicon Valley giants such as Facebook and Twitter, which run very public anti-disinformation programs, Brooking said: "Telegram is famously lax or absent in its content moderation policy." Continuing its crackdown against entities allegedly involved in a front-running scam using messaging app Telegram, Sebi on Thursday carried out search and seizure operations at the premises of eight entities in multiple locations across the country. The message was not authentic, with the real Zelenskiy soon denying the claim on his official Telegram channel, but the incident highlighted a major problem: disinformation quickly spreads unchecked on the encrypted app.
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