Geometry: Plane geometry. Stereometry

The textbook of elementary geometry, written by the outstanding mathematician and teacher A.P. Kiselev, withstood the attention of readers, withstood many reprints and for a long time was considered a reference to teaching the subject in the Russian and Soviet school. The refusal of training “according to Kiselev”, according to many experts, has now led to a significant drop in the quality of knowledge of schoolchildren (according to some estimates, now only 20% of students acquire full -fledged mathematical knowledge, while about 80% of schoolchildren were assumed) That is why the acquaintance of students and teachers with the classical manual A.P. Kiselev should become a necessary condition for further improvement of teaching geometry.
The main goal of the author of the book is to achieve an understanding of the subject by students. This includes both the ability of sympathy for the student, the ability to correctly understand the course of his thoughts and the causes of possible difficulties, and the accuracy in establishing concepts, simplicity in reasoning and compression in the presentation. Teaching in the book by A.P. Kiselev is easy and brings an undoubted positive result.
The text of this publication is presented in the classic form in which the book was published during the life of the author. The book is recommended for students of secondary schools, mathematics teachers, students of pedagogical universities, leaders of mathematical circles and all fans of mathematics