Art of Problem Solving.
- Mathematical Olympiad (USAMO) and the IMO, as American students have historically fared poorly on problems in Euclidean geometry.
- Math Olympiad teaching notes. Geometry Revisited: PDF; Geometry (Yellow group)., on an unusual technique that I had come up with to solve geometry problems.
- IMO Training 2010 Russian-style Problems Alexander Remorov Solutions: Combinatorial Geometry 1. Call a lattice point even if the sum of its coordinates is even.
The Irish Mathematical Olympiad. Number Theory, Discrete Mathematics, Inequalities, and Geometry. Collected IrMO Problems 1988-2014 (PDF file). PROBLEMS IN PLANE AND SOLID GEOMETRY v.1 Plane Geometry Viktor Prasolov translated and edited by Dimitry Leites. Winter Camp 2010 Three Lemmas in Geometry Yufei Zhao 2 Center of spiral similarity A spiral similarity1 about a point O(known as the center of the spiral similarity. Olympiad Geometry Olympiad Geometry covers numerous topics of geometry useful for Olympiad-level geometric proofs, including similar triangles, cyclic quadrilaterals.
Geometry Unbound Kiran S. III Some roads to modern geometry 79.