Free Mastering AMC 10/12 book: [ Ссылка ]. The book includes video lectures for every chapter, formulas for every topic, and hundreds of examples and practice problems with detailed video solutions.
Free Book of Mathematical Formulas & Strategies: [ Ссылка ]. This book is a 140+ page collection of the most important formulas and concepts needed for math competitions, and should be a useful reference for any math enthusiast.
Join our Discord server to discuss problems from the book or any help with math competitions in general: [ Ссылка ]
=============================================================
In this video, we showed the solution to 2021 AMC 10B Problem 9 / 12B Problem 5 (Using Rotation and Reflection tricks)
![Угадай мелодию [1997] » Филипп Киркоров](https://i.ytimg.com/vi/U51kPP6sMMU/mqdefault.jpg)
![[FAT BURNING🔥] 더운 여름 땡볕 아래 체지방 불태우기 50분 서서하는 전신 운동 | HOT SUMMER 50min ALL STANDING WORKOUT with@닥터벨](https://i.ytimg.com/vi/D5myYRtyQtI/mqdefault.jpg)
