Solutions of Chapter 6 Lines and Angles NCERT Mathematics Class 9 . Meticulously crafted NCERT solutions to boost your CBSE board exam preparation. Easily score more marks in Mathematics CBSE exam. Chapter 6 of CBSE Class 9 Maths, Lines and Angles , is a crucial part of the geometry section. It introduces students to fundamental concepts like the types of angles , the Angle Sum Property of a Triangle, and the properties of parallel lines and transversals. Learn the basic terms, definitions, types, and properties of lines and angles for Class 9 Maths. Find examples, formulas, and diagrams to help you understand the concepts and solve problems. In CBSE Class 9 Maths Chapter 6 Lines and Angles , by studying the relationship of lines and angles and how these interact with each other, we can solve geometric problems and prove important theorems.