New geometry of the triangle. Efremov D.D.

The attention of readers is proposed one of the first works in Russia in Russia, which systematically sets out the results of the study of geometric shapes, one way or another associated with the triangle. These results compiled a whole department in planimetry, which received the name “New Geometry of the Triangle” in foreign publications.

The book is recommended for mathematicians-geometers, teachers and students of natural and pedagogical universities, secondary school teachers and leaders of mathematical circles, as well as a wide range of fans of mathematics.