"Problems in Geometry: Plane Geometry" by I.F. Sharygin is an indispensable resource for anyone eager to deepen their understanding of geometry and master plane geometry problems. Whether you're a student preparing for exams or Olympiads, a schoolchild exploring the subject, or a teacher seeking high-quality teaching materials, this book is a true find. Sharygin offers readers a comprehensive collection of problems that cover all key aspects of plane geometry. Each task is carefully crafted with attention to detail, enabling not only the discovery of the correct answer but also a clear understanding of the reasoning behind it. Written in accessible, straightforward language, the book is understandable even for those just beginning their journey into geometry. At the same time, it doesn't shy away from challenging and intriguing problems that will captivate more experienced readers. The book explores a wide range of topics within plane geometry—from simple figures like triangles and squares to more complex concepts involving circles, polygons, and their properties. Sharygin doesn’t just provide solutions; he explains the methods that help readers develop their own problem-solving skills. This approach makes the book especially valuable for those looking to enhance their analytical thinking and learn how to apply geometric principles in real-world situations. Who will enjoy this book? Primarily, it’s perfect for high school students and university learners studying mathematics at a deeper level. It’s also ideal for those preparing for exams such as the Unified State Exam (EGE) or State Final Attestation (GIA), as well as participants in math Olympiads. Teachers will find a wealth of useful material for lesson planning and extra exercises for their students. Additionally, math enthusiasts eager to expand their knowledge and skills in geometry will find plenty to explore here. Sharygin addresses important themes related to logic, spatial reasoning, and problem-solving techniques. He demonstrates how geometry permeates everyday life—from architecture to art—and how understanding these principles can enrich our view of the world. The book inspires readers to see mathematics not just as an abstract science but as a practical tool for solving real-world problems. I.F. Sharygin’s writing style is characterized by clarity and logical flow. He has a talent for explaining complex concepts in simple terms, making his books accessible to a broad audience. Among his other well-known works are "Problems in Algebra" and "Geometry for Schoolchildren," which are also popular and highly regarded among readers. Sharygin is a mathematician who knows how to make learning engaging and approachable, inspiring new generations of mathematicians. If you’re looking for a high-quality geometry guide that helps you not only solve problems but also understand their core ideas, "Problems in Geometry: Plane Geometry" is an excellent choice. It will enrich your knowledge, sharpen your critical thinking, and equip you to find solutions across a variety of situations. Don’t miss the opportunity to dive into the fascinating world of plane geometry with I.F. Sharygin!