"Practical classes in geometry" is a unique work of Yakov Isaacovich Perelman, which has become a real storehouse of knowledge for all who seek to deepen their knowledge in the field of geometry. This book, published in the middle of the 20th century, is still relevant and in demand among students, schoolchildren and teachers, due to its accessible style of presentation and practical approach to learning. Perelman, known for his talented and fascinating textbooks on mathematics, in this work offers readers not only theoretical knowledge, but also a lot of practical tasks that help to consolidate the material studied. The book covers a wide range of topics from the basics of geometry to more complex concepts, such as the properties of figures, their area and volumes. Each section is accompanied by illustrations and examples, which makes the learning process more clear and understandable. This book will be interesting not only for schoolchildren and students, but also for anyone who wants to refresh their knowledge in geometry or just love mathematics. It is suitable both for self-study and for use in lessons at school or university. If you are looking for materials to prepare for exams or just want to better understand geometric principles, “Practical geometry classes” will become your reliable assistant. The topics raised in the book cover not only theoretical aspects, but also the practical application of geometry in everyday life. Perelman shows how geometry permeates various spheres from architecture to art, from engineering to nature. The reader will be able to see how geometric shapes and their properties affect our environment and how they can be used in various practical tasks. Perelman's style is clear and simple, which makes his books available to a wide audience. He is able to explain complex concepts in simple and understandable language, which allows readers to easily perceive new information. His other well-known works, such as "Entertaining Mathematics" and "Entertaining Physics", are also popular due to a similar approach - a combination of fascinating presentation and in-depth analysis. “Practical classes in geometry” is not just a textbook, but a real find for those who want not only to learn, but also to develop their analytical abilities. The book encourages the reader to think critically, solve problems and find non-standard solutions, which makes it especially valuable in the modern world, where the ability to analyze and apply knowledge is becoming increasingly relevant. If you are looking for something that will help you or your children better understand geometry, develop logical thinking and learn how to apply mathematical knowledge in life, this book will be an excellent choice. It will not only enrich your knowledge, but also inspire you to further study mathematics and its amazing world. Do not miss the opportunity to get acquainted with the work of one of the most famous authors in the field of popularization of science - Yakov Isaacovich Perelman .