When a pair of parallel lines meet an intersecting transversal, pairs of angles with particular properties are made. Corresponding angles The lines make an F shape .

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.

Crows in a lab were able to distinguish shapes that exhibited right angles, parallel lines, and symmetry, suggesting that, like humans, they have a special ability to perceive geometric regularity.