Class 6 Maths Ganita Prakash Chapter 6 Solutions (NCERT 2026–27) – Perimeter and Area
These Class 6 Maths Ganita Prakash Chapter 6 solutions cover Perimeter and Area from the new NCF-2023 textbook (Reprint 2026–27). Every Figure it Out question, Math Talk and Try This task is solved step by step — with worked perimeters of rectangles, squares and triangles, areas split into rectangles and triangles, area maze puzzles and house-plan problems — so you can master the chapter and revise it quickly.
- Chapter overview
- Key concepts & definitions
- Important formulas
- Figure it Out (Perimeter, Page 132)
- Figure it Out (Matha Pachchi running tracks, Page 133)
- Deep Dive, perimeter puzzles & Math Talk (answered)
- Figure it Out (Area, Page 138)
- Figure it Out (Area of triangles, Page 144)
- Area maze & Figure it Out (Page 149)
- Common mistakes to avoid
- Practice MCQs & Assertion–Reason
- Quick revision summary
- FAQs
Chapter 6 Overview
Chapter 6 of Ganita Prakash, Perimeter and Area, revisits two measurements of flat shapes. The perimeter is the total distance once around the boundary of a closed figure, while the area is the amount of region the figure encloses. The chapter recalls perimeter formulas for rectangles, squares and triangles, extends them to regular polygons, then explores running-track distances, “straight and diagonal” perimeters, and split-and-rejoin puzzles. In the second half it recalls area of rectangles and squares from grid paper, derives the area of a triangle as half a rectangle, and tackles area-maze puzzles and house-plan problems where the same area can hide very different perimeters. The Class 6 Maths Ganita Prakash Chapter 6 solutions below work through every Figure it Out, Deep Dive, Let’s Explore and Math Talk question step by step.
Key Concepts & Definitions
Perimeter: the distance covered along the boundary of a closed plane figure when you go around it once. For a polygon it is the sum of the lengths of all its sides.
Area: the amount of region enclosed by a closed figure, measured in square units (sq cm, sq m, …).
Regular polygon: a closed figure with all sides equal and all angles equal — e.g. the equilateral triangle, square and regular pentagon.
Triangle from a rectangle: a diagonal of a rectangle (or square) splits it into two equal triangles, so each triangle is exactly half the rectangle’s area.
Same area, different perimeter: two figures can enclose the same area yet have different perimeters (and vice-versa); a long thin rectangle has a larger perimeter than a square of equal area.
Estimating area on a grid: count full squares as 1 sq unit, count a region as 1 sq unit when more than half a square is covered, ignore parts less than half, and count an exact half as 1 sq unit.
Important Formulas (Chapter 6)
Perimeter of a rectangle = 2 × (length + breadth).
Perimeter of a square = 4 × side.
Perimeter of a triangle = sum of its three sides; for an equilateral triangle = 3 × side.
Perimeter of a regular polygon = number of sides × length of one side.
Area of a rectangle = length × breadth (width).
Area of a square = side × side.
Area of a triangle = half the area of the rectangle that contains it.
Figure it Out — Perimeter (Page 132)
Questions are reproduced verbatim from the NCERT Ganita Prakash textbook; the worked solutions are original and verified against the answers given in the book.
1. Find the missing terms: a. Perimeter of a rectangle = 14 cm; breadth = 2 cm; length = ?. b. Perimeter of a square = 20 cm; side of a length = ?. c. Perimeter of a rectangle = 12 m; length = 3 m; breadth = ?.
2. A rectangle having sidelengths 5 cm and 3 cm is made using a piece of wire. If the wire is straightened and then bent to form a square, what will be the length of a side of the square?
3. Find the length of the third side of a triangle having a perimeter of 55 cm and having two sides of length 20 cm and 14 cm, respectively.
4. What would be the cost of fencing a rectangular park whose length is 150 m and breadth is 120 m, if the fence costs ₹40 per metre?
5. A piece of string is 36 cm long. What will be the length of each side, if it is used to form: a. A square, b. A triangle with all sides of equal length, and c. A hexagon (a six sided closed figure) with sides of equal length?
6. A farmer has a rectangular field having length 230 m and breadth 160 m. He wants to fence it with 3 rounds of rope as shown. What is the total length of rope needed?
Figure it Out — Matha Pachchi! Running Tracks (Page 133)
Akshi runs the outer track (length 70 m, breadth 40 m); Toshi runs the inner track (length 60 m, breadth 30 m).
1. Find out the total distance Akshi has covered in 5 rounds.
2. Find out the total distance Toshi has covered in 7 rounds. Who ran a longer distance?
3. Think and mark the positions as directed— a. Mark ‘A’ at the point where Akshi will be after she ran 250 m. b. Mark ‘B’ at the point where Akshi will be after she ran 500 m. c. Now, Akshi ran 1000 m. How many full rounds has she finished running around her track? Mark her position as ‘C’. d. Mark ‘X’ at the point where Toshi will be after she ran 250 m. e. Mark ‘Y’ at the point where Toshi will be after she ran 500 m. f. Now, Toshi ran 1000 m. How many full rounds has she finished running around her track? Mark her position as ‘Z’.
Deep Dive, Perimeter Puzzles & Math Talk — Answered
These are the in-text exploratory and reflective tasks; the determinate ones are solved, the open ones are guided with worked examples.
Figure it Out — Area (Page 138)
1. The area of a rectangular garden 25 m long is 300 sq m. What is the width of the garden?
2. What is the cost of tiling a rectangular plot of land 500 m long and 200 m wide at the rate of ₹8 per hundred sq m?
3. A rectangular coconut grove is 100 m long and 50 m wide. If each coconut tree requires 25 sq m, what is the maximum number of trees that can be planted in this grove?
4. By splitting the following figures into rectangles, find their areas (all measures are given in metres).
Find the area of the following figures (squared-paper estimation, Page 140).
Figure it Out — Area of Triangles (Page 144)
1. Find the areas of the figures below by dividing them into rectangles and triangles.
Figure it Out — Area & Perimeter (Page 149)
1. Give the dimensions of a rectangle whose area is the sum of the areas of these two rectangles having measurements: 5 m × 10 m and 2 m × 7 m.
2. The area of a rectangular garden that is 50 m long is 1000 sq m. Find the width of the garden.
3. The floor of a room is 5 m long and 4 m wide. A square carpet whose sides are 3 m in length is laid on the floor. Find the area that is not carpeted.
4. Four flower beds having sides 2 m long and 1 m wide are dug at the four corners of a garden that is 15 m long and 12 m wide. How much area is now available for laying down a lawn?
5. Shape A has an area of 18 square units and Shape B has an area of 20 square units. Shape A has a longer perimeter than Shape B. Draw two such shapes satisfying the given conditions.
6. On a page in your book, draw a rectangular border that is 1 cm from the top and bottom and 1.5 cm from the left and right sides. What is the perimeter of the border?
7. Draw a rectangle of size 12 units × 8 units. Draw another rectangle inside it, without touching the outer rectangle that occupies exactly half the area.
8. A square piece of paper is folded in half. The square is then cut into two rectangles along the fold. Regardless of the size of the square, one of the following statements is always true. Which statement is true here? a. The area of each rectangle is larger than the area of the square. b. The perimeter of the square is greater than the perimeters of both the rectangles added together. c. The perimeters of both the rectangles added together is always 1½ times the perimeter of the square. d. The area of the square is always three times as large as the areas of both rectangles added together.
Common Mistakes to Avoid
Watch out for these
- Confusing perimeter with area — perimeter is a length (cm, m) around the boundary; area is the region inside (sq cm, sq m).
- Forgetting to double in a rectangle: perimeter is 2 × (length + breadth), not length + breadth.
- In running-track and rope problems, multiply one round’s perimeter by the number of rounds.
- Counting a diagonal grid segment as one straight unit — a diagonal is longer, so a grid triangle’s perimeter is more than the count of segments.
- Assuming equal areas mean equal perimeters — the same area can have many different perimeters (a long thin rectangle has a far bigger perimeter than a square of the same area).
- When estimating area on squared paper, forgetting the rule: count more-than-half squares as 1 and ignore less-than-half squares.
Practice MCQs & Assertion–Reason
1. The perimeter of a rectangle of length 12 cm and breadth 8 cm is:
(a) 20 cm (b) 40 cm (c) 96 cm (d) 48 cm
2. The perimeter of a square is 20 cm. The length of each side is:
(a) 4 cm (b) 5 cm (c) 10 cm (d) 80 cm
3. A wire bent into a 5 cm × 3 cm rectangle is re-bent into a square. The side of the square is:
(a) 3 cm (b) 4 cm (c) 8 cm (d) 16 cm
4. The third side of a triangle of perimeter 55 cm with two sides 20 cm and 14 cm is:
(a) 19 cm (b) 21 cm (c) 34 cm (d) 41 cm
5. The perimeter of a regular hexagon made from a 36 cm string has each side equal to:
(a) 4 cm (b) 6 cm (c) 9 cm (d) 12 cm
6. A rectangular garden 25 m long has an area of 300 sq m. Its width is:
(a) 10 m (b) 12 m (c) 15 m (d) 275 m
7. The area of a triangle that is exactly half of a 12 cm × 8 cm rectangle is:
(a) 48 sq cm (b) 96 sq cm (c) 20 sq cm (d) 40 sq cm
8. Among rectangles of area 24 sq units, the one with the least perimeter is:
(a) 1 × 24 (b) 2 × 12 (c) 3 × 8 (d) 4 × 6
9. The cost of fencing a 150 m × 120 m park at ₹40 per metre is:
(a) ₹10,800 (b) ₹21,600 (c) ₹43,200 (d) ₹7,20,000
10. Two closed figures with the same area:
(a) must have the same perimeter (b) can have different perimeters (c) must be congruent (d) cannot both be rectangles
For each Assertion–Reason question, choose: (A) Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion; (B) Both are true but the Reason is not the correct explanation; (C) Assertion is true but Reason is false; (D) Assertion is false but Reason is true.
A-R 1. Assertion: The perimeter of a square of side 5 cm is 20 cm.
Reason: The perimeter of a square equals 4 times the length of one side.
A-R 2. Assertion: A diagonal of a rectangle divides it into two triangles of equal area.
Reason: The two triangles overlap each other exactly, so each is half the rectangle.
A-R 3. Assertion: Two figures with the same area always have the same perimeter.
Reason: A long thin rectangle and a square of equal area can have very different perimeters.
A-R 4. Assertion: Toshi ran a longer distance than Akshi on the Matha Pachchi tracks.
Reason: Toshi covered 7 × 180 = 1260 m while Akshi covered 5 × 220 = 1100 m.
A-R 5. Assertion: A perfect square grid triangle of three diagonal segments has perimeter exactly 9 straight units.
Reason: A diagonal of a unit square has the same length as its side.
Quick Revision Summary
- Perimeter = total distance around the boundary; for a polygon it is the sum of all side lengths.
- Perimeter of a rectangle = 2 × (length + breadth); of a square = 4 × side; of a regular polygon = number of sides × side.
- Area = region enclosed, measured in square units; area of a rectangle = length × breadth, of a square = side × side.
- A diagonal splits a rectangle into two equal triangles, so a triangle’s area is half the rectangle that contains it.
- Estimate area on a grid: count full and more-than-half squares as 1, ignore less-than-half.
- Two figures can have the same area with different perimeters (and the same perimeter with different areas).
- For a fixed area, the longest thin rectangle has the greatest perimeter and the near-square has the least.
How to score full marks in this chapter
Write the correct formula first and substitute carefully — remember the “2 ×” for a rectangle’s perimeter and the “square units” for area. In rope or running-track problems, find one round’s perimeter, then multiply by the number of rounds. For composite shapes, split into rectangles and triangles, find each piece, and add. Always check units (cm vs m, length vs square units) and label your answer, so each step earns its mark.
Frequently Asked Questions
What is Class 6 Maths Ganita Prakash Chapter 6 about?
Chapter 6, Perimeter and Area, covers the perimeter of rectangles, squares, triangles and regular polygons, the area of rectangles, squares and triangles, estimating area on squared paper, and exploring how the same area can have different perimeters through running-track, split-and-rejoin and house-plan problems.
What is the difference between perimeter and area?
Perimeter is the distance once around the boundary of a closed figure and is measured in units of length (cm, m). Area is the amount of region the figure encloses and is measured in square units (sq cm, sq m).
How do you find the area of a triangle in Chapter 6?
In this chapter the area of a triangle is found as half the area of the rectangle that exactly contains it, because a diagonal of a rectangle divides it into two equal triangles.
Are these Class 6 Maths Ganita Prakash Chapter 6 solutions free?
Yes. All solutions are free and follow the official NCERT Ganita Prakash textbook for the 2026–27 session, with answers verified against the book’s answer key.
