Class 4 Maths Chapter 1 Shapes Around Us – Revision Notes

Quick revision notes for Class 4 Maths Chapter 1 (Shapes Around Us). Ideal for a fast recap before exams.

Flat vs Solid Shapes

• Flat (2D) shapes have length and width only – e.g. circle, triangle, square, rectangle.
• Solid (3D) shapes have length, width, and height – e.g. cube, sphere, cone, cylinder.

Describing Shapes

• Shapes are described by their number of sides and corners.
• Triangle: 3 sides, 3 corners. Square/rectangle: 4 sides, 4 corners.

Common Solid Shapes

• Cube: 6 flat square faces.
• Sphere: round, no edges or corners.
• Cylinder: 2 flat circular faces and a curved surface.
• Cone: 1 flat circular face and a curved surface meeting at a point.

One-Line Summary

Shapes around us are either flat (2D) or solid (3D), and can be identified and described by counting their sides, corners, and faces.

Written by Satish

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