Прямая, проходящая через ортоцентр треугольника ABC пересекает его стороны AB и AC в точках D и E соответственно. Сторона BC, перпендикуляр к AB в точке D и перпендикуляр к AC в точке E образуют треугольник T. Докажите, что описанные окружности треугольников T и ABC касаются.
Прямая, проходящая через ортоцентр треугольника ABC пересекает его стороны AB и AC в точках D и E соответственно. Сторона BC, перпендикуляр к AB в точке D и перпендикуляр к AC в точке E образуют треугольник T. Докажите, что описанные окружности треугольников T и ABC касаются.
'Wild West' "Someone posing as a Ukrainian citizen just joins the chat and starts spreading misinformation, or gathers data, like the location of shelters," Tsekhanovska said, noting how false messages have urged Ukrainians to turn off their phones at a specific time of night, citing cybersafety. And while money initially moved into stocks in the morning, capital moved out of safe-haven assets. The price of the 10-year Treasury note fell Friday, sending its yield up to 2% from a March closing low of 1.73%. But the Ukraine Crisis Media Center's Tsekhanovska points out that communications are often down in zones most affected by the war, making this sort of cross-referencing a luxury many cannot afford. The next bit isn’t clear, but Durov reportedly claimed that his resignation, dated March 21st, was an April Fools’ prank. TechCrunch implies that it was a matter of principle, but it’s hard to be clear on the wheres, whos and whys. Similarly, on April 17th, the Moscow Times quoted Durov as saying that he quit the company after being pressured to reveal account details about Ukrainians protesting the then-president Viktor Yanukovych.
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