,Solving Problems in Geometry: Insights and Strategies for Mathematical Olympiad and Competitions - by Kim Hoo Hang & Haibin Wang (Paperback),107 Geometry Problems from the Awesomemath Year-Round Program,Euclidean Geometry in Mathematical Olympiads (Problem Books) (Problem Books, 27): Evan Chen: 9781470466206: Amazon.com: Books,Geometry problems from Mathematical Olympiads: Todev, R.: 9781450524087: Amazon.com: Books