The Geometry Puzzle Book

Mechanical puzzles are inherently a hands-on experience; it is extremely difficult to solve one simply by looking at it. This is the fifth puzzle book authored by the duo of Goodman and Garibi, and it introduces a first-ever feature: the ability to manufacture all the parts and pieces the puzzles require. Whether you use a paper printer to create our Pepakura nets or a 3D printer for our STL files, you can physically produce the elements needed to engage with these unique 3D puzzles, which have never before been published in book format. Beyond the tactile experience, this volume serves as a powerful pedagogical tool. The authors provide not only the solutions but also a 'Mind Toolset'—a systematic approach designed to help you develop the skills necessary to solve puzzles and understand the concepts behind them. The book guides you from foundational 2D geometry—exploring tiling, dissection, and shape manipulation using triangles and rectangles—to complex 3D spatial reasoning, including cube assemblies, nets, and pyramid structures. This book is the result of extensive experience, with most puzzles polished through years of testing with students. The aim is to challenge and delight puzzle lovers, mathematics teachers, students, and anyone looking to step away from screens and engage their hands and minds in a better way.