Selected Problems and Theorems of Elementary Mathematics . Part 3 . Geometry (stereometry)" by D. About. Shklyarsky, N. N. Chentsova and I. M. Jagloma is a fascinating and deep immersion in the world of geometry, which will become an indispensable assistant for students, schoolchildren and anyone interested in mathematics. This volume is devoted to stereometry, a section of geometry that studies three-dimensional shapes and their properties. The book offers readers not only theoretical foundations, but also a set of tasks that will help to consolidate the knowledge gained. Stereometry is not just a set of formulas and theorems, it is a whole world in which volumes, areas and angles come to life, creating amazing geometric designs. The authors, known for their deep knowledge and ability to explain complex things easily, offer readers to consider topics such as body volumes, sections and projections, as well as various methods of calculation and proof. Each task in the book not only illustrates theoretical positions, but also encourages the reader to think, develops logical thinking and spatial perception. This book will be of interest not only to students of mathematical specialties, but also to anyone who wants to deepen their knowledge in the field of geometry. It is suitable for both high school students preparing for exams and teachers looking for high-quality material for preparing lessons. In addition, mathematics enthusiasts who want to expand their horizons and understand how geometry is applied in real life will also find much useful in this edition. The topics raised in the book are relevant and important. Stereometry is used in architecture, engineering, physics, and even art. Understanding three-dimensional figures and their properties allows you to better understand the world around you and its laws. The book helps to develop skills that will be useful not only in school, but also in everyday life, for example, in design or construction. The style of the authors is clear and logical . They are able to explain complex things in simple language, which makes the material available to a wide audience. D. About. Shklyarsky, N. N. Chentsov and I. M. Yaglom are names familiar to many, their previous works such as "Selected Problems and Theorems of Elementary Mathematics. Part 1. Algebra" and "Selected Problems and Theorems of Elementary Mathematics. Part 2 . Geometry (planimetry)”, have already established themselves as reliable sources of knowledge. These authors not only have excellent knowledge of the subject, but also know how to inspire readers to study mathematics. Selected Problems and Theorems of Elementary Mathematics . Part 3 . Geometry (stereometry)" is not just a textbook, it is a real guide to the fascinating world of geometry. It will help readers not only to prepare for exams, but also to develop critical thinking, learn to solve problems in a non-standard way and see the beauty of mathematics in everyday life. If you are looking for a high-quality and useful guide to stereometry, this edition will be an excellent choice. Do not miss the opportunity to discover the amazing world of three-dimensional geometry together with talented authors!