Learn about the types of angles that are formed by intersecting and parallel lines with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

Class 9 Maths Chapter 6 Lines and Angles is available here for download in PDF format. We have provided here the latest edition of the chapter which is published by the NCERT on its official website.

If you have forgotten your basic geometry, parallel lines are represented by the little squares you see above, which signify 90-degree angles. Here’s the catch, non-Euclidean geometry does not ...