The book "Fundamentals of Geometry" by B. F. Kagan is not just a textbook, but a real find for anyone who wants to understand the basics of geometry and its application in various fields. In this work, the author offers readers a unique look at the geometric concepts that underlie many scientific and practical disciplines. The book will be of interest to both students and students, as well as teachers, as well as anyone who seeks to expand their knowledge in the field of mathematics. From the first pages, Kagan immerses the reader in the fascinating world of geometry, starting with simple concepts and gradually moving to more complex topics. He masterfully explains how geometric shapes and their properties shape our perception of space and time. The reader will be able to learn about different types of geometries, such as Euclidean, non-Euclidean and analytical, and understand how they affect our understanding of the world around us. The book pays special attention to the intuitive understanding of geometric concepts. Kagan uses many illustrative examples and illustrations that help to assimilate the material. His writing style is clear and accessible, which makes complex mathematical ideas understandable even for those who are not experts in mathematics. This makes Basics of Geometry an ideal choice for schoolchildren, students, and anyone who wants to develop their analytical abilities. The book raises many important topics, such as the connection of geometry with other sciences, the role of geometry in art and architecture, and its application in modern technologies. Kagan shows how geometry permeates our lives, from designing buildings to creating computer graphics. Readers will be able to see how geometric principles are used in different professions, from engineering to design, and how they help solve real-world problems. "Fundamentals of Geometry" also stands out among other mathematics textbooks due to its philosophical depth. Kagan not only conveys knowledge, but also asks important questions about the nature of space and time, about how we perceive the world around us. This makes the book not only a textbook, but also a source of inspiration for reflection on the deeper aspects of mathematics and its role in our understanding of reality. If you are looking for literature that combines scientific rigor and accessibility, the Fundamentals of Geometry F. Kagan will be a great choice . The book will be useful both for those who are just starting out in the study of mathematics, and for more experienced readers who want to refresh their knowledge or look at familiar things from a new side. In. F. Kagan is a well-known Russian mathematician and teacher, author of many textbooks and articles that have been recognized both in Russia and abroad. His work is distinguished by a deep understanding of the subject and the ability to convey complex ideas to a wide audience. If you are interested in topics such as “geometry for beginners”, “mathematics in life”, or you are looking for “textbooks on geometry”, “Basics of geometry” will be a great addition to your library. By reading this book, you will not only master the basics of geometry, but also discover a world in which mathematics and art, science and philosophy are intertwined in an amazing dance. Do not miss the opportunity to immerse yourself in an exciting journey through geometric spaces with a B. F. Kagan!