Maths
Shapes (2D and 3D)
Learning Objectives
- Name and describe 2D shapes: circle, square, triangle, rectangle, and oval.
- Name and describe 3D shapes: sphere, cube, cone, cylinder, and cuboid.
- Count the sides and corners of 2D shapes.
- Identify faces, edges, and corners of 3D shapes.
- Find shapes in everyday objects around us.
- Understand the difference between 2D and 3D shapes.
Let Us Begin!
Look around you! The wheel of a bicycle is round like a circle. A book looks like a rectangle. A birthday cap is like a cone. A cricket ball is like a sphere. Shapes are everywhere! We see flat shapes (called 2D shapes) and solid shapes (called 3D shapes) all around us. Let us learn about them.
2D Shapes (Flat Shapes)
2D shapes are flat. You can draw them on paper. They have sides (straight lines) and corners (where two sides meet).
| Shape | Sides | Corners | Special Feature | Examples in Life |
|---|---|---|---|---|
| Circle | 0 (curved) | 0 | Perfectly round | Coin, bangle, wheel, roti |
| Square | 4 (all equal) | 4 | All sides same length | Handkerchief, tile, carrom board |
| Triangle | 3 | 3 | Fewest sides possible | Samosa, tent, traffic sign |
| Rectangle | 4 (2 long, 2 short) | 4 | Opposite sides equal | Book, door, window, TV screen |
| Oval | 0 (curved) | 0 | Like a stretched circle | Egg, mirror, cricket ground |
A square is a special rectangle where all 4 sides are equal!
3D Shapes (Solid Shapes)
3D shapes are solid. You can hold them in your hands. They have faces (flat surfaces), edges (where two faces meet), and corners/vertices (pointed tips).
| Shape | Faces | Edges | Corners | Examples in Life |
|---|---|---|---|---|
| Sphere (Ball) | 1 curved | 0 | 0 | Cricket ball, orange, marble, globe |
| Cube | 6 (all square) | 12 | 8 | Dice, Rubik's cube, ice cube, sugar cube |
| Cuboid (Box) | 6 (rectangles) | 12 | 8 | Brick, book, matchbox, tiffin box |
| Cone | 1 flat + 1 curved | 1 | 1 (tip) | Ice cream cone, birthday cap, funnel |
| Cylinder | 2 flat + 1 curved | 2 | 0 | Tin can, drum, glass, pipe |
A sphere can roll in any direction. A cylinder can roll only forward and backward. A cube cannot roll at all!
Difference Between 2D and 3D Shapes
| 2D Shapes (Flat) | 3D Shapes (Solid) |
|---|---|
| Can be drawn on paper | Can be held in hands |
| Have length and width only | Have length, width, and height |
| Have sides and corners | Have faces, edges, and corners |
| Examples: circle, square, triangle | Examples: sphere, cube, cone |
Key Words
| Word | Meaning |
|---|---|
| 2D shape | A flat shape with length and width (can be drawn on paper) |
| 3D shape | A solid shape with length, width, and height (can be held) |
| Side | A straight line that forms part of a flat shape |
| Corner (Vertex) | The point where two sides or edges meet |
| Face | A flat surface of a 3D shape |
| Edge | The line where two faces of a 3D shape meet |
⭐ Key Points to Remember
- A circle and oval have no sides or corners — they are curved.
- A square has 4 equal sides and 4 corners.
- A triangle has 3 sides and 3 corners (fewest sides of any shape).
- A rectangle has 4 sides and 4 corners (opposite sides are equal).
- 3D shapes have faces, edges, and corners.
- A sphere has no edges or corners — it is perfectly round.
- A cube has 6 faces, 12 edges, and 8 corners.
Practice Questions
A. Fill in the Blanks (10)
1. A triangle has sides and corners.
2. A has 4 equal sides.
3. An ice cream cone is shaped like a .
4. A circle has corners.
5. A cricket ball is shaped like a .
6. A cube has faces.
7. A rectangle has sides and corners.
8. A shape can be drawn on paper (2D / 3D).
9. A cylinder has flat faces and curved face.
10. A matchbox is shaped like a .
B. Choose the Correct Answer (MCQ - 5)
1. How many sides does a rectangle have?
2. Which shape looks like a tin can?
3. Which shape has no sides or corners?
4. How many corners does a cube have?
5. Which 3D shape can roll in any direction?
C. Short Answer (5)
1. Name two things in your classroom that are shaped like a rectangle.
2. What is the difference between a square and a rectangle?
3. Name one 3D shape and one thing in your home that looks like it.
4. What is the difference between a 2D shape and a 3D shape?
5. Name two objects shaped like a cylinder.
D. True or False (5)
1. A square has 4 equal sides.
2. A sphere has 6 faces.
3. A triangle has 4 corners.
4. A cylinder can roll.
5. An oval is a 3D shape.
E. Match the Following (5)
| Shape | Real-life Object |
|---|---|
| 1. Sphere | a) Dice |
| 2. Cube | b) Drum |
| 3. Cone | c) Cricket ball |
| 4. Cylinder | d) Birthday cap |
| 5. Cuboid | e) Brick |
🎨 Activity: Shape Hunt at Home
Walk around your home and find one object for each shape: circle, square, triangle, rectangle, sphere, cube, cone, cylinder. Draw and label each one in your notebook. Which shape did you find the most?
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