The book describes in an accessible form the fundamental geometry course for students in grades 7-9 (planimetry). The main attention is paid to the methodology for solving problems - more than half a thousand (!) Problems with solutions. Theorems, theorem problems and important methodological recommendations are used as theoretical material. Modern, already familiar to readers of the books of the publishing house "Fact," design, ease of presentation of the material, arrangement of tasks from simple to complex, make the book unique and useful.