Definition, properties of sides/angles, and signs of a parallelogram.
Using similarity to find the heights of objects or distances across rivers. 4. Circles (Окружность) Interactions: Tangent lines and their properties.
Central angles vs. Inscribed angles (and the relationship between them). geometriia 8 klass
2. Area of Polygons (Площадь многоугольников)
Circumscribed and inscribed circles of a triangle. 5. Vectors (Векторы) - Optional/Advanced Basics: Definition of a vector, coordinates, and length. Definition, properties of sides/angles, and signs of a
A cornerstone of 8th-grade geometry used to find missing side lengths in right triangles.
3. Similarity of Triangles (Подобие треугольников) Introducing the concept of "same shape, different size." properties of sides/angles
Angle-Angle (AA), Side-Angle-Side (SAS), and Side-Side-Side (SSS).