1. Real numbers
2. Polynomials
4. Triangles
5. Trigonometry
9. Circles
11. Mensuration
11.1.1. Measuring Areas of Triangles
11.1.2.1. Area Between Two Rectangles
11.1.2.2. Area of a Quadrilateral
11.1.2.3. Area of a Parallelogram
11.1.2.4. Area of a Rhombus
11.1.2.5. Area of a Trapezium