Class 9th Maths Number systems (16) Polynomials (12) Coordinate Geometry (2) Linear Equations in Two Variables (3) Introduction to Euclid Geometry (2) Lines and Angles (7) Triangles (9) Quadrilaterals (9) Areas of Parallelograms and Triangles (4) Circles (3) Constructions (8) Heron’s Formula (2) Surface Areas and Volumes (6) Statistics (11) Probability (3)