Elementary Geometry is an engaging and insightful book by A.P. Kiselev that immerses readers in the world of geometry, revealing its fundamental principles and laws. This book is an invaluable resource for students, schoolchildren, and anyone eager to deepen their understanding of this essential branch of mathematics. In *Elementary Geometry*, Kiselev offers more than just a collection of theorems and formulas—he invites readers into a vibrant world where every geometric figure and axiom comes to life. Skillfully blending theory with practical examples, the author provides numerous exercises to help reinforce what you've learned. The book covers a wide range of topics, from simple shapes like triangles and circles to more complex concepts such as polyhedra and their properties. Readers will not only grasp the core principles but also learn how to apply them in various situations, making the material accessible and engaging. Renowned for his pedagogical talent and deep mathematical knowledge, Kiselev designed this book with the needs of modern learners in mind. His clear and logical writing style makes even the most challenging concepts easy to understand. Unlike many textbooks, *Elementary Geometry* is not overloaded with dry theory; instead, it offers an exciting journey through the world of geometry, with each page full of discoveries. This book will appeal not only to school students and university students but also to anyone passionate about mathematics, interested in developing logical thinking, and eager to tackle non-standard problems. It is suitable for self-study as well as classroom use. Thanks to its accessible language and straightforward explanations, *Elementary Geometry* will be a perfect supplement to school curricula and a helpful tool for exam preparation. The topics covered go beyond basic geometry. Kiselev touches on questions of logic, spatial reasoning, and even the philosophy of mathematics. He demonstrates how geometry permeates our daily lives—from architecture to art—and highlights its importance in understanding the world around us. Readers will see how geometric principles are applied across various fields, making the study of this science not only useful but also fascinating. If you're looking for a book that will help you understand the fundamentals of geometry and learn how to apply them practically, A.P. Kiselev’s *Elementary Geometry* will be your trusted companion on this journey. It’s ideal for those who want to learn with understanding, as well as for anyone aiming to develop their mathematical skills. Don’t miss the chance to explore the captivating world of geometry with this wonderful work, which will become your reliable guide in mastering one of the most intriguing sciences!