Lines and Angles - NCERT Class 9 Maths

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The chapter 6 starts with an introduction about points and lines we covered in previous grades followed by basic terms and definitions used. Next, we have a brief introduction of intersecting lines and non-intersecting lines with an explanation to a pair of angles. Later, the chapter discusses parallel lines and transversal with various theorems involved. Finally, in the end, the chapter focuses on the angle sum property of a triangle with few examples and a series of exercise questions.

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Lines and Angles | Solved Examples