A quick summary of Class 2 Maths Chapter 4 — the four basic 2D shapes, and how they relate to 3D shapes through shadows and tracings.
Last Updated: September 10, 2026
Class 2 Maths Chapter 4 Revision Notes: Shadow Story (Togalu)
Chapter type: Geometry — introduction to 2D (flat) shapes and their link to 3D shapes.
Key ideas to remember:
Circle xe2x80x94 a round flat shape with no straight sides and no corners — the shadow of a sphere.
Square xe2x80x94 a flat shape with 4 equal straight sides and 4 corners.
Rectangle xe2x80x94 a flat shape with 4 straight sides (opposite sides equal) and 4 corners, but not all sides the same length.
Triangle xe2x80x94 a flat shape with 3 straight sides and 3 corners.
What you should be able to do after this chapter:
1. Name circle, square, triangle, and rectangle correctly.
2. Count the sides and corners of any of these four shapes.
3. Tell the difference between a square and a rectangle.
Remember: A shape’s shadow or the flat face of a 3D object is a simple, physical way to ‘see’ the connection between solid shapes and flat shapes — try it with a torch at home.
- Chapter 1: A Day at the Beach – Free PDF Download
- Chapter 2: Shapes Around Us – Free PDF Download
- Chapter 3: Fun with Numbers – Free PDF Download
- Chapter 5: Playing with Lines – Free PDF Download
- Chapter 6: Decoration for Festival – Free PDF Download
- Chapter 7: Rani's Gift – Free PDF Download
- Chapter 8: Grouping and Sharing – Free PDF Download
- Chapter 9: Which Season is it? – Free PDF Download
- Chapter 10: Fun at the Fair – Free PDF Download
- Chapter 11: Data Handling – Free PDF Download
Frequently Asked Questions
Do I need to memorise the number of sides for each shape?
Yes — knowing that a triangle has 3 sides, and a square/rectangle has 4, is a basic fact used throughout later geometry chapters.
How does this chapter connect to the next one?
Playing with Lines (Chapter 5) looks more closely at the straight and curved lines that make up these very shapes.

