(Axioms of stereometry, parallel lines, intersection of lines and planes).

The for the geometry textbook for grades 10-11 by L. S. Atanasyan and co-authors (V. F. Butuzov, S. B. Kadomtsev, etc.) provides comprehensive answers and step-by-step explanations for both basic and advanced levels. Reliable Online Resources

(Addition, subtraction, and multiplication of vectors). Chapter 5: Method of Coordinates in Space . Chapter 6: Cylinders, Cones, and Spheres . Chapter 7: Volumes of Polyhedra and Bodies of Revolution .

: Offers verified answers organized by chapters and paragraphs, such as "Parallelism of lines and planes" and "Angles between lines".