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Bulgaria MO, 1999, Problem 2

На картинке два подобных треугольника. O и H — центр описанной окружности и ортоцентр маленького, H' — ортоцентр большого. Докажите, что OH=OH'.



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Bulgaria MO, 1999, Problem 2

На картинке два подобных треугольника. O и H — центр описанной окружности и ортоцентр маленького, H' — ортоцентр большого. Докажите, что OH=OH'.

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Despite Telegram's origins, its approach to users' security has privacy advocates worried. There was another possible development: Reuters also reported that Ukraine said that Belarus could soon join the invasion of Ukraine. However, the AFP, citing a Pentagon official, said the U.S. hasn’t yet seen evidence that Belarusian troops are in Ukraine. During the operations, Sebi officials seized various records and documents, including 34 mobile phones, six laptops, four desktops, four tablets, two hard drive disks and one pen drive from the custody of these persons. Founder Pavel Durov says tech is meant to set you free Multiple pro-Kremlin media figures circulated the post's false claims, including prominent Russian journalist Vladimir Soloviev and the state-controlled Russian outlet RT, according to the DFR Lab's report.
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