4. Integers
6. Fractions
7. Decimals
10. Unitary Method
13. Mensuration
14. Geometry
14.2. Types of Lines
14.4. Angle
14.4.1. Introduction to Angles
14.4.4. Types of an Angles
14.5. Triangles
14.6. Quadrilateral
14.7. Polygon
14.8. Circle
16. Linear Symmetry
17. Data Handling