Selected Problems and Theorems of Elementary Mathematics . Geometry. Planimetry by D. About. Shklyarsky, N. N. Chentsova and I. M. Jagloma is not just a textbook, but a real treasure trove of knowledge for all who seek to understand deeper the basics of geometry and planimetry. This edition will be an indispensable assistant for both students and teachers, as well as for all mathematics lovers who want to develop their analytical abilities and logical thinking. The book covers a wide range of tasks, from simple to complex, making it ideal for readers with different levels of training. Each section contains carefully selected tasks that not only illustrate theoretical aspects, but also encourage the reader to independently search for solutions. The authors pay special attention to the explanation of key theorems and concepts, which allows readers not only to remember the material, but also to understand its essence. This makes the book especially valuable for schoolchildren, students and anyone who is ready for intellectual challenges. The topics covered in the book cover the basic concepts of planimetry, such as the properties of figures, theorems about triangles, polygons, and circles. The authors offer readers not only theoretical knowledge, but also practical skills that will be useful in real life. For example, understanding geometric properties can help in architecture, design, and even in everyday tasks related to spatial thinking. Selected Problems and Theorems of Elementary Mathematics . Geometry. Planimetry" stands out for its unique style of presentation. The authors use an accessible and understandable language, which makes complex mathematical concepts easier to understand. Their approach to learning is based on the principle of “from simple to complex”, which allows readers to gradually delve into the material and confidently master new topics. D. About. Shklyarsky, N. N. Chentsov and I. M. Yaglom are well-known mathematicians and teachers whose work has long won recognition in the scientific community. Their previous editions, such as "Elements of Mathematical Analysis" and "Tasks in Mathematics", are also popular and are reference books for many students.[citation needed] In this new work, the authors continue the tradition of high-quality and accessible presentation, which makes their books in demand among a wide audience. This book will be interesting not only for students and schoolchildren, but also for teachers who are looking for new approaches to learning. It can be a basis for preparing for exams, as well as for self-study. Readers interested in mathematics will find in it many interesting problems and theorems that will help develop critical thinking and analytical abilities. If you are looking for a high-quality geometry and planimetry manual that will help you not only prepare for exams, but also to understand mathematical concepts more deeply, then "Selected Problems and Theorems of Elementary Mathematics. Geometry. Planimetry" is what you need. This book will be your reliable companion in the world of mathematics, opening up new horizons of knowledge and opportunities for you. Do not miss the chance to immerse yourself in the fascinating world of geometry and discover all its secrets!