"Class 9 Math Book" is the offline book of compulsory math subject of class 9. It is an up-to-date book. It will also be updated as the curriculum development center (CDC) updates the book. It contains the following chapters: - Sets - Profit and Loss - Commission and Taxation - Home Arithmetic - Area - Solids - Algebraic Expressions - Indices - Ratio and Proportion - Linear Equations - Quadratic Equations - Triangles - Parallelograms - Construction - Similarity - Circles - Trigonometry - St