Class 4 Maths Chapter 1, Shapes Around Us, opens NCERT’s Grade 4 Maths Mela textbook (2026–27) with Deepa’s visit to Delhi monuments (India Gate, Qutub Minar, Jantar Mantar) to explore 3D prisms and pyramids, cube towers on triangular dot paper, right/acute/obtuse angles with straws, pentagons, and circles.
What Class 4 Mathematics Chapter 1 Covers
3D Shapes, Prisms, Pyramids & Cube Towers models real buildings using wooden blocks; sorts 3D shapes into prisms and pyramids by their faces, edges, and corners; and builds and draws cube towers on triangular/isometric dot paper.
When Lines Meet — Right, Acute & Obtuse Angles and Circles explores angles formed when lines meet using straw models — identifying right angles (L-shaped corners), acute angles (smaller than a right angle), and obtuse angles (larger than a right angle) — plus 5-sided regular pentagons and circle centres/radii.
Exercises in Chapter 1
- Let Us Do, Let Us Try, and Let Us Solve textbook exercises.
- Hands-on straw/grid models, dot-paper drawing, and number games.
Read Class 4 Mathematics Chapter 1 Online
More Chapters
- Next: Chapter 2: Hide and Seek
- Hindi medium: Class 4 Maths Chapter 1 PDF in Hindi (Ganit Mela)
- All Mathematics chapters and the other Class 4 books: Class 4 NCERT books 2026-27
- All Class 1 to 12 NCERT Textbooks: NCERT Books PDF (Class 1–12)
- Every book chapter by chapter: NCERT chapter wise PDF
FAQ
What is the difference between a prism and a pyramid in Chapter 1?
A prism has two identical, parallel flat end-faces connected by rectangular side faces, whereas a pyramid has a single base polygon and triangular side faces that meet at a single top point (apex).
What are right, acute, and obtuse angles?
A right angle looks like the corner of a book or the letter ‘L’ (90°); an acute angle is sharper/smaller than a right angle; and an obtuse angle opens wider than a right angle.