Useful Notes & Links
Mathematics
AMC 8: Counting Shapes with the Help of Labels
2022 AIME II Problem 1 – The Art of Choosing Variables
How to Use a Protractor to Measure an Angle (5 minute)
A quick and systematic method for solving polynomial and rational inequalities – the labeling technique (See our Algebra 1 videos)
Solving equations with square roots without introducing extraneous solutions (See our Algebra 1 videos)
Simplifying Polygon Problems Using Exterior Angles (See our Geometry videos)
About AoPS Books and Videos
A List of Typos, Errors, and Comments on AoPS Textbooks
Why the Free AoPS Videos Are Not Sufficient
A Correction to AoPS Intermediate Algebra, Section 10.4, Problem 10.27 (1971 AHSME Problem 33)
About Math Competitions