Adding and subtracting vectors, multiplying a vector by a number.
2. Area of Polygons (Площадь многоугольников)
3. Similarity of Triangles (Подобие треугольников) Introducing the concept of "same shape, different size." geometriia 8 klass
Thales's Theorem and the definition of similar figures.
A cornerstone of 8th-grade geometry used to find missing side lengths in right triangles. Adding and subtracting vectors, multiplying a vector by
Circumscribed and inscribed circles of a triangle. 5. Vectors (Векторы) - Optional/Advanced Basics: Definition of a vector, coordinates, and length.
Central angles vs. Inscribed angles (and the relationship between them). Adding and subtracting vectors
Angle-Angle (AA), Side-Angle-Side (SAS), and Side-Side-Side (SSS).