: The book highlights the importance of neat, precise diagrams which are often legible enough to understand the proof on their own. Book Details Authors : Titu Andreescu, Michal Rolinek, and Josef Tkadlec. Length : 174 pages. ISBN : 978-0979926945.
| Problem # | Typical Contest Level | Key Technique | |-----------|----------------------|----------------| | 12 | AIME | Cyclic quadrilaterals | | 38 | AIME / USAJMO | Power of a point, radical axis | | 55 | USAMO | Spiral similarity, Miquel point | | 92 | IMO Shortlist | Inversion + harmonic division | | 104 | IMO | Complete quadrilateral, Gauss line | titu andreescu 106 geometry problems pdf