Thales's Theorem and the definition of similar figures.
Angle-Angle (AA), Side-Angle-Side (SAS), and Side-Side-Side (SSS).
3. Similarity of Triangles (Подобие треугольников) Introducing the concept of "same shape, different size."
Adding and subtracting vectors, multiplying a vector by a number.
Definition, properties of sides/angles, and signs of a parallelogram.
Thales's Theorem and the definition of similar figures.
Angle-Angle (AA), Side-Angle-Side (SAS), and Side-Side-Side (SSS).
3. Similarity of Triangles (Подобие треугольников) Introducing the concept of "same shape, different size."
Adding and subtracting vectors, multiplying a vector by a number.
Definition, properties of sides/angles, and signs of a parallelogram.
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