Based on common curriculum standards for this level, the GDZ covers:
: Analysis of geometric figures and their properties.
: Unlike standard answer keys, these solutions often provide the "how" behind the answer, reflecting the textbook's emphasis on finding multiple ways to solve a single problem.
: The Demidova textbook often includes "starred" tasks (increased difficulty) and logical puzzles. GDZ helps parents and students verify these unconventional problems that might not follow a standard formula.