Access solutions for topics like triangles and angles on GDZ.ru or Megaresheba .
Detailed answers for quadrilaterals and similarity theorems are available on GDZ.ru and GDZ.RF .
You can find the specific solutions for your grade level on these platforms:
Solutions for 2017 and later editions covering 9th-grade topics can be found on Shkola.Obozrevatel and GDZ.ru .