GMT Webinar 19-05-2016
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![[13] Свойства Ортоцентра. Внешний угол вписанного четырехугольника,ГМТ,точки симметричные ортоцентру](https://sun9-18.userapi.com/OD2WplreDoxrQFwyo9eFaZ6knz0qr0nlENr6iA/ZOHgvssAh0Q.jpg)
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