NCERT Class 6 Mathematics Ganita Prakash: Chapter 6 — Perimeter and Area
This chapter, "Perimeter and Area" from NCERT's Ganita Prakash for Class 6 Mathematics, introduces the concept of perimeter. It defines perimeter as the distance covered along the boundary of a closed plane figure. For polygons, it's the sum of all side lengths. The chapter revisits and reinforces formulas for the perimeter of rectangles (2 × (length + breadth)) and squares (4 × side length), illustrating with examples. It emphasizes understanding perimeter as the total distance around a shape's outer boundary, crucial for foundational geometry learning in the CBSE curriculum.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 6 |
| Subject | Mathematics |
| Book | Ganita Prakash |
| Chapter | Chapter 6 — Perimeter and Area |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 3 minutes |
| Word count | 430 |
Learning outcomes
- Define perimeter of a closed plane figure.
- Calculate the perimeter of a polygon by summing its side lengths.
- Apply the formula for the perimeter of a rectangle.
- Apply the formula for the perimeter of a square.
Vocabulary
| Word | Meaning |
|---|---|
| Perimeter | The distance covered along the boundary of a closed plane figure. |
| Polygon | A closed plane figure made up of line segments. |
| Rectangle | A quadrilateral with four right angles and opposite sides equal. |
| Square | A quadrilateral with four equal sides and four right angles. |
| Length | The longer side of a rectangle. |
| Breadth | The shorter side of a rectangle. |
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Practice questions
- What is the perimeter of a square with a side length of 5 cm? Answer: 20 cm (4 * 5 cm)
- Find the perimeter of a rectangle with a length of 10 cm and a breadth of 6 cm. Answer: 32 cm (2 * (10 cm + 6 cm))
- Define perimeter in your own words. Answer: The total distance around the outside of a shape.
Frequently asked questions
What is the perimeter of a closed plane figure?
The perimeter is the distance covered along its boundary when you go around it once.
How do you find the perimeter of a polygon?
You find the perimeter of a polygon by summing the lengths of all its sides.
What is the formula for the perimeter of a rectangle?
The formula is Perimeter = 2 × (length + breadth).
What is the formula for the perimeter of a square?
The formula is Perimeter = 4 × length of a side.
If a rectangle has a length of 15 cm and a breadth of 10 cm, what is its perimeter?
The perimeter is 50 cm (2 * (15 cm + 10 cm)).
Related resources
Important topics
Topics covered
NCERT Class 6 Mathematics — Ganita Prakash — Chapter 6 — Perimeter and Area. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.