NCERT Class 4 Mathematics Math-Mela: Chapter 11 — Ink Design
This chapter, 'Fun with Symmetry,' from NCERT's Class 4 Mathematics book 'Math-Mela,' revisits the concept of symmetry introduced in previous grades. Students explore symmetry through practical activities like creating ink designs by folding paper and dropping colours, and making paper airplanes. The chapter encourages them to identify lines of symmetry, understand how symmetry affects patterns, and consider the role of symmetry in real-world objects. It prompts critical thinking about whether an object can fly if it lacks symmetry and encourages experimentation with asymmetrical designs. The activities aim to reinforce the understanding of symmetry and its applications, aiding students in their CBSE mathematics learning.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 4 |
| Subject | Mathematics |
| Book | Math-Mela |
| Chapter | Chapter 11 — Ink Design |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 2 minutes |
| Word count | 254 |
Learning outcomes
- Understand the concept of symmetry.
- Identify the line of symmetry in various patterns and shapes.
- Create symmetrical designs using simple materials.
- Explore the relationship between symmetry and flight in paper airplanes.
- Differentiate between symmetrical and asymmetrical objects.
Vocabulary
| Word | Meaning |
|---|---|
| Symmetry | A property of an object where one half is a mirror image of the other half. |
| Line of symmetry | The line that divides a shape into two equal and mirror-image halves. |
| Asymmetrical | Lacking symmetry; not symmetrical. |
| Pattern | A repeated decorative design or arrangement. |
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Practice questions
- What is a line of symmetry? Answer: A line of symmetry is a line that divides a shape into two identical halves that are mirror images of each other.
- Can you name one object that has symmetry? Answer: A butterfly, a leaf, or a circle are examples of objects with symmetry.
- What happens when you fold a paper in half and sprinkle colours? Answer: When you fold a paper in half, sprinkle colours, and press it, you create a symmetrical ink design.
- Will a paper airplane fly better if it is symmetrical? Answer: The chapter suggests exploring this, implying that symmetry might contribute to stable flight.
Frequently asked questions
What is the main concept taught in NCERT Class 4 Mathematics Chapter 1?
The chapter 'Fun with Symmetry' focuses on understanding and identifying the concept of symmetry and the line of symmetry.
What activities are included in the chapter?
The chapter includes activities like creating ink designs and making paper airplanes to explore symmetry.
What is a line of symmetry in the context of the chapter?
It's the line that divides a design or shape into two identical, mirror-image halves.
Can symmetry be found in everyday objects?
Yes, the chapter mentions symmetry in rangolis, masks, and buildings, implying its presence in everyday objects.
What does it mean for a design to be asymmetrical?
An asymmetrical design is one that does not have a line of symmetry; its two halves are not mirror images.
How does this chapter help with CBSE studies?
It reinforces foundational geometry concepts like symmetry, crucial for Class 4 Mathematics and future CBSE exams.
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NCERT Class 4 Mathematics — Math-Mela — Chapter 11 — Ink Design. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.