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Разминка дня (простите) №28:
Докажите, что в ортоцентрическом тетраэдре (в котором все высоты пересекаются в одной точке) окружности девяти точек граней лежат на одной сфере



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Разминка дня (простите) №28:
Докажите, что в ортоцентрическом тетраэдре (в котором все высоты пересекаются в одной точке) окружности девяти точек граней лежат на одной сфере

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"The inflation fire was already hot and now with war-driven inflation added to the mix, it will grow even hotter, setting off a scramble by the world’s central banks to pull back their stimulus earlier than expected," Chris Rupkey, chief economist at FWDBONDS, wrote in an email. "A spike in inflation rates has preceded economic recessions historically and this time prices have soared to levels that once again pose a threat to growth." Founder Pavel Durov says tech is meant to set you free 'Wild West' 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. On Telegram’s website, it says that Pavel Durov “supports Telegram financially and ideologically while Nikolai (Duvov)’s input is technological.” Currently, the Telegram team is based in Dubai, having moved around from Berlin, London and Singapore after departing Russia. Meanwhile, the company which owns Telegram is registered in the British Virgin Islands.
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