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1) Существует ли тетраэдр, основания высот которого не принадлежат граням? 2) Существует ли выпуклый многогранник и точка внутри такая, что основания всех перпендикуляров, опущенных из нее на грани, не принадлежат граням?
1) Существует ли тетраэдр, основания высот которого не принадлежат граням? 2) Существует ли выпуклый многогранник и точка внутри такая, что основания всех перпендикуляров, опущенных из нее на грани, не принадлежат граням?
BY Геометрия с Ниловым
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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. I want a secure messaging app, should I use Telegram? Either way, Durov says that he withdrew his resignation but that he was ousted from his company anyway. Subsequently, control of the company was reportedly handed to oligarchs Alisher Usmanov and Igor Sechin, both allegedly close associates of Russian leader Vladimir Putin. The regulator said it has been undertaking several campaigns to educate the investors to be vigilant while taking investment decisions based on stock tips. Russians and Ukrainians are both prolific users of Telegram. They rely on the app for channels that act as newsfeeds, group chats (both public and private), and one-to-one communication. Since the Russian invasion of Ukraine, Telegram has remained an important lifeline for both Russians and Ukrainians, as a way of staying aware of the latest news and keeping in touch with loved ones.
from ar
