Lena had always feared geometry. To her, circles were just loops, and triangles were three stubborn lines refusing to get along. But when her math coach slid a worn USB drive across the table and said, “It’s the 2021 edition. Problem 37 will humble you,” she knew she was in trouble.

Do not rely solely on 106 Geometry Problems . Pair it with:

Mastering ratios to solve length-based problems. 2. Advanced Problems

Both books are widely considered because they bridge the gap between standard high school geometry and competitive olympiad-level problem solving.

The 2021 edition follows a clean, effective layout: