NCERT Class 5 Mathematics Math-Magic: Chapter 2 — Shapes and Angles
This chapter introduces students to the concept of shapes and angles through a fun activity involving twin sisters, Rohini and Mohini. They learn to identify closed and open shapes and count the number of sides. The activity highlights how different arrangements of sides can result in different shapes, even with the same number of sides. Students are encouraged to observe and differentiate between shapes based on their properties. The chapter aims to build foundational understanding of geometric concepts, preparing students for more complex topics in mathematics. It emphasizes visual recognition and logical reasoning skills essential for CBSE curriculum.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 5 |
| Subject | Mathematics |
| Book | Math-Magic |
| Chapter | Chapter 2 — Shapes and Angles |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 1 minute |
| Word count | 137 |
Learning outcomes
- Identify closed and open shapes.
- Count the number of sides in a given shape.
- Differentiate between shapes based on their sides.
- Understand the concept of geometric shapes and their properties.
Vocabulary
| Word | Meaning |
|---|---|
| Shape | The external form or appearance of someone or something. |
| Angle | The space (two-dimensional) between two intersecting lines or surfaces at or near the point at which they meet. |
| Closed shape | A shape where the boundary is a continuous loop, with no beginning or end. |
| Open shape | A shape where the boundary is not a continuous loop; it has a distinct beginning and end. |
| Sides | The straight lines that form the boundary of a shape. |
The complete chapter text is read in the official NCERT PDF viewer below (streamed from ncert.nic.in). This page provides NCERT Help study material — summary, vocabulary, practice questions, and FAQs — not a full reproduction of the textbook.
Read chapter online
This PDF is loaded from the official NCERT website (ncert.nic.in). Use the page buttons below to read — download is disabled on NCERT Help.
Read page by page below. PDF is streamed from the official NCERT website — no download button on this page.
Practice questions
- Is the shape made by Rohini a closed shape? Answer: Yes
- How many sides does Rohini's shape have? Answer: 6 sides
- Mohini made a shape that was not the same as Rohini's. What could be a reason? Answer: The arrangement of the sides was different, even if the number of sides was the same.
Frequently asked questions
What is the main activity in the NCERT Class 5 Mathematics Chapter 2?
The chapter features an activity where twin sisters, Rohini and Mohini, challenge each other to make and identify shapes using matchsticks.
What is a closed shape?
A closed shape is a shape where the boundary forms a continuous loop, connecting back to the starting point without any gaps.
What is an open shape?
An open shape is a shape where the boundary does not form a continuous loop; it has a distinct start and end point.
How many sides did Rohini's shape have?
Rohini's shape had 6 sides.
What did Mohini learn from her first attempt?
Mohini learned that even with the same number of sides, a shape can be different if the sides are arranged differently.
Related resources
Important topics
Topics covered
NCERT Class 5 Mathematics — Math-Magic — Chapter 2 — Shapes and Angles. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.