2. Polynomials
7. Triangles
10. Circles
11. Constructions
12. Heron's Formula
14. Statistics
15. Probability
Class 9 NCERT (CBSE and ICSE) Intercept Theorem (Thales Theorem, or Basic Proportionality Theorem) and Related Problems
Master this topic as part of Intercept Theorem and Midpoint Theorem