ОГЭ Математика 2026 | Задание 15: Вся геометрия за 17 минут! Не решишь — ОБНУЛЯТ работу 😱

OGE Mathematics 2026 | Complete Geometry Theory (Task #15) ⚠️ Many people don't know: if you don't solve at least TWO geometry problems (out of FIVE), your points for the entire assignment can be nullified! This video covers the complete theory for Task #15 of the OGE Mathematics, covering only the most relevant topics plus practical examples. In 17 minutes, we'll cover key formulas, problem types, and solve them right away to reinforce the concepts. My website – https://kubaevskaya.ru My OGE and USE courses – https://kubaevskaya.ru/courses ✅ In this video: – All the geometry theory needed for the OGE – How to avoid a score being nullified due to geometry – What to write in the solution to get it counted – Common mistakes and how to avoid them – A complete analysis of typical problem #15 📌 Suitable for: – 9th-grade students preparing for the OGE – Those who are afraid of geometry – Anyone who wants to maintain their scores on the exam – Tutors and parents helping their child 📥 Useful materials: 👉 Playlist "OGE Mathematics 2026" — 👉    • ОГЭ по математике   00:00 - Introduction and Topic 00:41 - What are vertical angles? 01:28 - Types of triangles that may appear in Task 15 of the OGE Mathematics 06:18 - Trigonometric functions 07:54 - Reduction formula 09:13 - Similarity of triangles 10:37 - Sinus theorem 11:26 - Cosine theorem 12:12 - Triangle area formulas 14:07 - Example 1 of a problem from Task 15 of the OGE Mathematics 15:39 - Example 2 of a problem from Task 15 of the OGE Mathematics (area of ​​a triangle) 16:38 - Ending 📩 For questions about individual lessons, please contact us via Telegram: https://t.me/anastasya_ku #OGE2026 #task22OGE #piecewisefunctions #ogemathematics #OGEfunctions #OGEgraphs #9thgrademathematics #OGEpreparation #OGEonMathematics #mathematicstutor