Годовой курс «Легион с Ильичом 2024/2025». Бонусный урок №27. Номер 17. Планиметрия | Эрик | 100б

00:00:00 - Introduction with a humorous reference to the "wall of masterpiece profile". 00:04:04 - Review of trigonometric identities, including Chebyshev and Van der Waerden. 00:09:46 - Problem 1a: solving a geometry problem. 00:30:10 - A tasty additional construction in a trapezoid. 00:32:25 - Problem 1b: another geometry challenge. 00:41:27 - Problem 2a: a more complex problem. 00:48:31 - A shorter solution for problem 2a. 00:50:33 - Completing the first proof for problem 1a. 00:52:31 - Problem 2b: final problem of the lesson.