Master different methods and solve puzzles. * More than 100 tasks: from basics to challenges * 11 chapters to explore * Built-in glossary with geometric terms * Step-by-step instructions * Easy to use XSection is a trainer of solid geometry problem solving. It teaches you how to perceive 2D representation of polyhedra, lines, and planes from 3D Euclidean space. All the problems can be solved without complex calculations. The app contains the required theory facts and explanations. If you forgo