#геометрия #задача
Серединные перпендикуляры к сторонам AB и AC треугольника ABC пересекают медиану AM в точках D и E соответственно. Прямые BD и CE пересекаются в точке F. Докажите, что F лежит на окружности, проходящей через A и середины сторон AB и AC.
BY JustScience | Олимпиадная Математика
Mr. Durov launched Telegram in late 2013 with his brother, Nikolai, just months before he was pushed out of VK, the Russian social-media platform he founded. Mr. Durov pitched his new app—funded with the proceeds from the VK sale—less as a business than as a way for people to send messages while avoiding government surveillance and censorship.
Telegram is a free app and runs on donations. According to a blog on the telegram: We believe in fast and secure messaging that is also 100% free. Pavel Durov, who shares our vision, supplied Telegram with a generous donation, so we have quite enough money for the time being. If Telegram runs out, we will introduce non-essential paid options to support the infrastructure and finance developer salaries. But making profits will never be an end-goal for Telegram.
JUSTSCIENCEMATH Telegram Group from sg