NCERT Class 4 Mathematics Math-Mela (Sanskrit): Chapter 11 — सममिति
This chapter, 'Sammiti' (Symmetry), from NCERT's Class 4 Mathematics textbook 'Math-Mela' in Sanskrit, revisits the concept of symmetry explored in previous classes. It introduces symmetry through practical activities like creating ink blots and paper airplanes. Students learn to identify lines of symmetry in various shapes and designs. The chapter emphasizes understanding how symmetry affects the balance and flight of a paper airplane, encouraging observation and discussion among peers. Through these hands-on exercises, students develop a deeper understanding of symmetrical and asymmetrical forms, crucial for spatial reasoning and geometric concepts in mathematics.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 4 |
| Subject | Mathematics |
| Book | Math-Mela (Sanskrit) |
| Chapter | Chapter 11 — सममिति |
| Language | Sanskrit |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 1 minute |
| Word count | 157 |
Learning outcomes
- Identify and draw lines of symmetry in given shapes.
- Understand the concept of symmetry through practical activities.
- Differentiate between symmetrical and asymmetrical figures.
- Apply the concept of symmetry to real-world objects like paper airplanes.
Vocabulary
| Word | Meaning |
|---|---|
| समरूपता | Symmetry |
| मसीविन्यासः | Ink blot design |
| सममिति-रेखा | Line of symmetry |
| कर्गदविमानस्य | Paper airplane |
| प्रतिबिंबं | Reflection |
| असममितिस्थलं | Asymmetrical place/design |
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Practice questions
- What is a line of symmetry? Answer: A line that divides a shape into two equal and mirror-like halves is called a line of symmetry.
- How can you create a symmetrical ink blot design? Answer: By folding a paper in half, placing a few ink drops in the center, and then pressing the paper to spread the ink evenly.
- In the paper airplane activity, what happens if the airplane is asymmetrical? Answer: If the airplane is asymmetrical, it may not fly properly or for a long duration.
Frequently asked questions
What is the main topic of NCERT Class 4 Mathematics Chapter 11?
The main topic is 'Sammiti', which means Symmetry.
What activities are included in the chapter on symmetry?
The chapter includes activities like creating ink blot designs and constructing paper airplanes to understand symmetry.
What is a line of symmetry in the context of the chapter?
A line of symmetry is a line that divides a shape into two identical halves that are mirror images of each other.
How does symmetry relate to a paper airplane?
A symmetrical paper airplane is more likely to fly straight and for a longer duration compared to an asymmetrical one.
Where can I find the NCERT Class 4 Mathematics Math-Mela Chapter 11 PDF?
The NCERT Class 4 Mathematics Math-Mela Chapter 11 PDF can be downloaded from educational websites or the official NCERT portal.
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NCERT Class 4 Mathematics — Math-Mela (Sanskrit) — Chapter 11 — सममिति. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.