Calculation exercises Practical problems Algebraic expressions Graphs of elementary functions Equations and systems of equations Inequalities and systems of inequalities Quadratic functions Trigonometric identities Algebraic models in solving practical problems Sequences and progressions Elements of combinatorics Probability and statistics Angle Calculating area and perimeter in real-life problems Right-angled triangles Properties of triangles and quadrilaterals Formulas for the area of polygons. Circles and tangents. Regular polygons Similarity; the Laws of Sines and Cosines.