 # NCERT Solutions for Class 6 Maths Chapter 13 Symmetry

## NCERT Solutions Class 6 Maths Chapter 13 – Free PDF Download

NCERT Solutions for Class 6 Maths Chapter 13 Symmetry is a useful resource for the CBSE students to prepare well for the final exam. The exercise-wise solutions of the textbook questions are solved in a step wise manner by keeping in mind the marks weightage allotted by the CBSE board. These NCERT Solutions will help students identify the concepts which they are weak at and work on them for a good score. It will also improve the time management skills among students which is very important from the exam point of view.

A balanced and a proportionate similarity which is found in two halves of an object is known as Symmetry. We can also say that one-half of the figure is the mirror image of the other half. Line of Symmetry is the imaginary line along which one can fold a figure in order to obtain the symmetrical halves. This chapter also contains various concepts related to symmetry explained in a systematic manner. Students can easily download the free PDF of NCERT Solutions for Class 6 Maths by clicking on the link provided below.                      ## Topics and sub topics of NCERT Solutions for Class 6 Maths Chapter 13

The exercise wise topics and sub-topics in NCERT Solutions for Class 6 Maths Chapter 13 Symmetry are as follows:

• 13.1 – Introduction
• 13.2 – Making Symmetric Figures: Ink-blot Devils
• 13.3 – Figures with Two Lines of Symmetry
• 13.4 – Figures with Multiple Lines of Symmetry
• 13.5 – Reflection and Symmetry.

## Access NCERT Solutions for Class 6 Chapter 13: Symmetry

Exercise 13.1 page no: 263

1. List any four symmetrical objects from your home or school.

Solutions:

The four symmetrical objects are black board, the table top, a pair of scissors, the computer disc etc.

2. For the given figure, which one is the mirror line, l1 or l2? Solutions:

l2 is the mirror line of the figure. When given figure is folded about the line l2 the left part exactly cover the right part and vice versa

3. Identify the shapes given below. Check whether they are symmetric or not. Draw the line of symmetry as well. Solutions:

(a) Yes. It is a symmetric

(b) Yes. It is a symmetric

(c) No, it is not a symmetric

(d) Yes. It is a symmetric

(e) Yes. It is a symmetric

(f) Yes. It is a symmetric

The following figures given below are the line of symmetry 4. Copy the following on a squared paper. A square paper is what you would have used in your arithmetic notebook in earlier classes. Then complete them such that the dotted line is the line of symmetry. Solutions:

To make the dotted line as a line of symmetry the given figure may be drawn as follows

(a) (b) (c) (d) (e) (f) 5. In the figure, l is the line of symmetry. Complete the diagram to make it symmetric. Solutions:

The below figure is the complete diagram to make it symmetric 6. In the figure, l is the line of symmetry. Draw the image of the triangle and complete the diagram so that it becomes symmetric. Solutions:

The required triangle may be drawn as follow to make it symmetric Exercise 13.2 Page no: 267

1. Find the number of lines of symmetry for each of the following shapes : Solutions:

(a) For the given figure there are 4 lines of symmetry.

(b) For the given figure there are 4 lines of symmetry.

(c) For the given figure there are 4 lines of symmetry.

(d) For the given figure there is only 1 line of symmetry.

(e) For the given figure there are 6 lines of symmetry.

(f) For the given figure there are 6 lines of symmetry.

(g) For the given figure there is no line of symmetry.

(h) For the given figure there is no line of symmetry.

(i) For the given figure there are 3 lines of symmetry.

Now we may observe the lines of symmetry in the above figures as follows 2. Copy the triangle in each of the following figures on squared paper. In each case, draw the line(s) of symmetry, if any and identify the type of triangle. (Some of you may like to trace the figures and try paper-folding first!) Solutions:

(a) The given triangle is an isosceles triangle. Here it will be only 1 line of symmetry. (b) The given triangle is an isosceles triangle. Here it will be only 1 line of symmetry. (c) The given triangle is a right angled triangle. Here it will be only 1 line of symmetry. (d) The given triangle is a scalene triangle. Here it will be no line of symmetry.

3. Complete the following table. Solutions:

The given table is completed as follows: In case of circles we find infinite lines. Here some lines of symmetry are drawn. Similarly, we can draw more symmetric lines for the circle.

4. Can you draw a triangle which has

(a) exactly one line of symmetry?

(b) exactly two lines of symmetry?

(c) exactly three lines of symmetry?

(d) no lines of symmetry?

Sketch a rough figure in each case.

Solutions:

(a) Yes, we can draw an isosceles triangle which has only 1 line of symmetry. (b) No, we cannot draw a triangle which has 2 lines of symmetry.

(c) Yes, we can draw an equilateral triangle which has 3 lines of symmetry. (d) Yes, we can draw a scalene triangle which has no line of symmetry. 5. On a squared paper, sketch the following:

(a) A triangle with a horizontal line of symmetry but no vertical line of symmetry.

(b) A quadrilateral with both horizontal and vertical lines of symmetry.

(c) A quadrilateral with a horizontal line of symmetry but no vertical line of symmetry.

(d) A hexagon with exactly two lines of symmetry.

(e) A hexagon with six lines of symmetry.

Solutions:

(a) A triangle with a horizontal line of symmetry but no vertical line of symmetry can be drawn as follows (b) A quadrilateral with both horizontal and vertical lines of symmetry can be drawn as follows (c) A quadrilateral with a horizontal line of symmetry but no vertical line of symmetry can be sketched as follows (d) A hexagon with exactly two lines of symmetry may be drawn as follows (e) A hexagon with 6 lines of symmetry may be drawn as follows 6. Trace each figure and draw the lines of symmetry, if any:  Solutions:

(a) The given figure is an isosceles triangle. Hence, there will be 1 line of symmetry. (b) The given figure has two lines of symmetry. (c) The given figure has 4 lines of symmetry. (d) The given figure is an octagonal which has 2 lines of symmetry. (e) The given figure has only 1 line of symmetry. (f) The given figure has 4 lines of symmetry. 7. Consider the letters of English alphabets, A to Z. List among them the letters which have

(a) vertical lines of symmetry (like A)

(b) horizontal lines of symmetry (like B)

(c) no lines of symmetry (like Q)

Solutions:

(a) Vertical lines of symmetry are A, H, I, M, O, T, U, V, W, X, Y.

(b) Horizontal lines of symmetry are B, C, D, E, H, I, K, O, X.

(c) No lines of symmetry are F, G, J, L, N, P, Q, R, S, Z.

8. Given here are figures of a few folded sheets and designs drawn about the fold. In each case, draw a rough diagram of the complete figure that would be seen when the design is cut off. Solutions:

We may draw a diagram of complete figure as follows Exercise 13.3 page no: 271

1. Find the number of lines of symmetry in each of the following shapes. How will you check your answers?  Solutions:

(a) For the given figure there are 4 lines of symmetry. (b) For the given figure there is only 1 line of symmetry. (c) For the given figure there are 2 lines of symmetry. (d) For the given figure there are 2 lines of symmetry. (e) For the given figure there is only 1 line of symmetry. (f) For the given figure there are 2 lines of symmetry. 2. Copy the following drawing on squared paper. Complete each one of them such that the resulting figure has two dotted lines as two lines of symmetry. How did you go about completing the picture?

Solutions:

We can complete these figures by drawing similar parts as shown in these figures. First about the vertical line of symmetry and then about the horizontal line of symmetry or first about the horizontal line of symmetry and then about the vertical line of symmetry.

Completed figures are as follows 3. In each figure alongside, a letter of the alphabet is shown along with a vertical line. Take the mirror image of the letter in the given line. Find which letters look the same after reflection (i.e. which letters look the same in the image) and which do not. Can you guess why?

Try for O E M N P H L T S V X Solutions:

The mirror images of these figures are as follows The letters having vertical line of symmetry will have same mirror images. These letters are O, M, H, T, V, X and thus these letters will look the same.

NCERT Solutions is an important study material which provides a strong fundamental knowledge of crucial concepts from an exam perspective. Students can access the following materials on Symmetry at BYJU’S to speed up their exam preparation.

Disclaimer:

Dropped Topics – 13.1 Introduction, 13.2 Making symmetric Figures: Ink-blot devils, 13.3 Figures with two lines of symmetry, 13.4 Figures with multiple (more than two) lines of symmetry, 13.5 Reflection and symmetry.

## Frequently Asked Questions on NCERT Solutions for Class 6 Maths Chapter 13

### What is the effective way to study the Chapter 13 Symmetry of NCERT Solutions for Class 6 Maths?

The problems and solutions of Chapter 13 Symmetry play an important role in building a strong foundation of fundamental concepts. The below mentioned steps should be followed in order to cover the concepts effectively-
1. Get acquainted with the basic concepts
2. Understand the topic symmetry
3. Memorise the important formulas
6. Practise the problems on a daily basis.

### Define symmetry included in the Chapter 13 of NCERT Solutions for Class 6 Maths.

Students must first understand that the topics included in the Chapter 13 of NCERT Solutions for Class 6 Maths creates a strong foundation of symmetry. The symmetry of an object is defined as one half of the object is a mirror image of the other half. When an object is split into half, both the sides are exactly the same. The line which divides them is called the line of symmetry. One simple example is reflection symmetry. The object can be divided into one or more than one line of symmetry.

### Define point of symmetry as per the Chapter 13 of NCERT Solutions for Class 6 Maths.

Point symmetry exists when a figure is drawn around a single central point. It is for figures having a point through which the symmetry can be established. This point is called the centre of symmetry. For example, the hourglass shows point symmetry.

1. ronak singh

very good