Class 9 · Mathematics · New NCERT
Chapter 12: Quadrilaterals
Chapter 12 studies quadrilaterals, which occur everywhere in daily life, beginning with the question of which quadrilaterals can tile the plane. It develops the properties of the different types of quadrilaterals and uses them to answer the tiling question at the end of the chapter.
Topics covered
- Quadrilaterals and tiling the plane
- Types and properties of quadrilaterals