A scalene triangle has 3 sides of different lengths and 3 unequal angles. An isosceles triangle has 2 sides of equal length. The dashes on the lines show they are equal in length. The angles at ...

(Motivate) If the corresponding sides of two triangles are proportional, their corresponding angles are equal and the two triangles are similar.

Class 9 Maths NCERT Book Chapter 6 - Lines and Angles is provided here in PDF format. Get the latest edition of the chapter to prepare for your Maths Exam in the 2021-2022 session.