Properties of isosceles and right trapezoids; the midline of a trapezoid.

3. Similarity of Triangles (Подобие треугольников) Introducing the concept of "same shape, different size."

Using similarity to find the heights of objects or distances across rivers. 4. Circles (Окружность) Interactions: Tangent lines and their properties.

Students learn to derive and apply formulas for the space inside shapes. Squares and Rectangles ( Advanced Areas: Parallelograms ( ), Triangles ( ), and Trapezoids (

Central angles vs. Inscribed angles (and the relationship between them).

This unit focuses on the classification and properties of four-sided polygons.

Thales's Theorem and the definition of similar figures.