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Докажите, что ортоцентры отмеченных треугольников лежат на одной прямой, проходящей через точку пересечения диагоналей описанного четырехугольника.



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Докажите, что ортоцентры отмеченных треугольников лежат на одной прямой, проходящей через точку пересечения диагоналей описанного четырехугольника.

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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 fake Zelenskiy account reached 20,000 followers on Telegram before it was shut down, a remedial action that experts say is all too rare. The SC urges the public to refer to the SC’s I nvestor Alert List before investing. The list contains details of unauthorised websites, investment products, companies and individuals. Members of the public who suspect that they have been approached by unauthorised firms or individuals offering schemes that promise unrealistic returns So, uh, whenever I hear about Telegram, it’s always in relation to something bad. What gives? Meanwhile, a completely redesigned attachment menu appears when sending multiple photos or vides. Users can tap "X selected" (X being the number of items) at the top of the panel to preview how the album will look in the chat when it's sent, as well as rearrange or remove selected media.
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