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If you're looking for help with the classic textbook, you’re likely dealing with one of the most standard math resources in the Russian-speaking curriculum.
Quadrilaterals (parallelograms, trapezoids), the Pythagorean theorem, and the concept of area.
If you’re stuck, look at just the first 1-2 lines of the solution to see which theorem was used (e.g., "By the property of isosceles triangles..."). Then, close the manual and try to finish it yourself.
In Atanasyan's problems, a bad drawing usually means a wrong answer. Compare your sketch with the solution's diagram to see if you missed a right angle or a midpoint. Common "Stumbling Blocks" in Atanasyan
Are you working on a right now that I can help you walk through?
Many students mix up the three signs in 7th grade. GDZ can help you see which specific sides or angles you need to "match" to prove equality.
The basics—points, lines, angles, and the first signs of triangle equality.