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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"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. Since January 2022, the SC has received a total of 47 complaints and enquiries on illegal investment schemes promoted through Telegram. These fraudulent schemes offer non-existent investment opportunities, promising very attractive and risk-free returns within a short span of time. They commonly offer unrealistic returns of as high as 1,000% within 24 hours or even within a few hours. Investors took profits on Friday while they could ahead of the weekend, explained Tom Essaye, founder of Sevens Report Research. Saturday and Sunday could easily bring unfortunate news on the war front—and traders would rather be able to sell any recent winnings at Friday’s earlier prices than wait for a potentially lower price at Monday’s open. The gold standard of encryption, known as end-to-end encryption, where only the sender and person who receives the message are able to see it, is available on Telegram only when the Secret Chat function is enabled. Voice and video calls are also completely encrypted. Some privacy experts say Telegram is not secure enough
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