The Book of Geometry . Workbook. 9th grade" by L. C. Atanasyan and his co-authors are not just a textbook, but a real guide to the fascinating world of geometry, which will help students not only to master the theoretical foundations, but also to develop practical skills in solving problems. This workbook will become an indispensable assistant for ninth-graders seeking to deepen their knowledge and prepare for exams. From the first pages, the reader plunges into the world of geometric shapes, theorems and axioms, which, it would seem, may seem complex and confusing. However, the authors masterfully submit the material, making it accessible and understandable. The workbook includes a variety of tasks that will help to consolidate the material passed and develop logical thinking. Here you will find both simple problems for finding perimeters and areas, and more complex ones that require in-depth analysis and application of theorems. This book will be interesting not only for schoolchildren, but also for their parents who want to help their children in their studies. It is suitable for both independent work and for use in lessons. Teachers will also appreciate the rich selection of assignments and the ability to diversify their lessons using the workbook as additional material. The topics raised in the book cover a wide range of geometric concepts: from the properties of triangles and quadrilaterals to the study of circles and volumes of bodies. Each section is accompanied by illustrations and diagrams, which makes the learning process more visual and fascinating. It is important to note that the authors focus on the practical application of geometry in real life, which helps students to see the significance of the material being studied. Style L. C. Atanasyan and his team are distinguished by clarity and logical presentation . They skillfully combine theory with practice, which allows the reader not only to remember information, but also to understand it. Atanasyan is a well-known author of textbooks on mathematics, and his works have long established themselves as high-quality and effective. Among his other well-known works can be distinguished "Algebra. Workbook" and "Mathematics. 7th grade", which are also popular among schoolchildren and teachers. Workbook "Geometry . 9th grade” will be an excellent tool for preparing for state certification and will help develop the analytical skills necessary for successful study of mathematics in high school. Students who seek an in-depth understanding of the subject will find in this book many useful materials and tasks that will allow them to confidently cope with any tasks. If you are looking for a high-quality geometry guide that will help you or your child not only prepare for exams, but also to love mathematics, then “Geometry . Workbook. Grade 9" L. C. Atanasyan is exactly what you need. Do not miss the opportunity to take a step towards success in your studies and discover the world of geometry with this wonderful book!