eVidyarthi

Main Menu
  • eVidyarthi
  • School
    • Class 6th
      • Maths Class 6
      • Science Class 6
      • Hindi Class 6
      • व्याकरण
      • English Class 6
      • English Grammar
      • Sanskrit Class 6
      • Geography
      • Civics
      • History
    • Class 7th
      • Maths Class 7
      • Science Class 7
      • Hindi Class 7
      • व्याकरण
      • English Class 7
      • English Grammar
      • Sanskrit Class 7
      • Geography
      • Civics
      • History
    • Class 8th
      • Maths Class 8
      • Science Class 8
      • Hindi Class 8
      • व्याकरण
      • English Class 8
      • English Grammar
      • Sanskrit Class 8
      • Geography
      • Civics
      • History
    • Class 9th
      • Maths Class 9
      • Science Class 9
      • Hindi Class 9
      • English Class 9
      • English Grammar
      • व्याकरण
      • Economics Class 9
      • Geography Class 9
      • Civics Class 9
      • History Class 9
    • Class 10th
      • Maths Class 10
      • Science Class 10
      • Hindi Class 10
      • English Class 10
      • English Grammar
      • व्याकरण
      • Economics Class 10
      • History Class 10
      • Civics Class 10
      • Geography Class 10
    • Class 11th
      • Maths Class 11
      • Accounts Class 11
      • English Class 11
      • English Grammar
      • व्याकरण
      • Chemistry Class 11
      • Physics Class 11
      • Biology Class 11
    • Class 12th
      • Maths Class 12
      • Accounts Class 12
      • Chemistry Class 12
      • Physics Class 12
      • Biology Class 12
      • English Class 12
      • English Grammar
      • व्याकरण
    • Close
  • English
    • Basic English Grammar
    • Basic English Speaking
    • English Vocabulary
    • English Idioms & Phrases
    • Personality Enhancement
    • Interview Skills
    • Close
  • Softwares
    • Microsoft Word
    • PhotoShop
    • Excel
    • Illustrator
    • PowerPoint
    • Close
Maths Class 7 || Menu
  • Important
    • Sample Paper
    • Important Formulas
    • Revision Notes
    • Mathematics Book
    • MCQs
    • Close
  • Integers
    • Ex 1.1
    • Ex 1.2
    • Ex 1.3
    • Ex 1.4
    • MCQs
    • Ex. 1.1 NCERT Solutions
    • Ex. 1.2 NCERT Solutions
    • Ex. 1.3 NCERT Solutions
    • Ex. 1.4 NCERT Solutions
    • Close
  • Fractions and Decimals
    • Ex 2.1
    • Ex 2.2
    • Ex 2.3
    • Ex 2.4
    • Ex 2.5
    • Ex 2.6
    • Ex 2.7
    • MCQs
    • Ex. 2.1 NCERT Solutions
    • Ex. 2.2 NCERT Solutions
    • Ex. 2.3 NCERT Solutions
    • Ex. 2.4 NCERT Solutions
    • Ex. 2.5 NCERT Solutions
    • Ex. 2.6 NCERT Solutions
    • Ex. 2.7 NCERT Solutions
    • Close
  • Data Handling
    • Ex 3.1
    • Ex 3.2
    • Ex 3.3
    • Ex 3.4
    • MCQs
    • Ex. 3.1 NCERT Solutions
    • Ex. 3.2 NCERT Solutions
    • Ex. 3.3 NCERT Solutions
    • Ex. 3.4 NCERT Solutions
    • Close
  • Simple Equations
    • Ex 4.1
    • Ex 4.2
    • Ex 4.3
    • Ex 4.4
    • MCQs
    • Ex. 4.1 NCERT Solutions
    • Ex. 4.2 NCERT Solutions
    • Ex. 4.3 NCERT Solutions
    • Ex. 4.4 NCERT Solutions
    • Close
  • Lines and Angles
    • Ex 5.1
    • Ex 5.2
    • MCQs
    • Ex. 5.1 NCERT Solutions
    • Ex. 5.2 NCERT Solutions
    • Close
  • Triangle and its Properties
    • Ex 6.1
    • Ex 6.2
    • Ex 6.3
    • Ex 6.4
    • Ex 6.5
    • MCQs
    • Ex. 6.1 NCERT Solutions
    • Ex. 6.2 NCERT Solutions
    • Ex. 6.3 NCERT Solutions
    • Ex. 6.4 NCERT Solutions
    • Ex. 6.5 NCERT Solutions
    • Close
  • Congruence of Triangles
    • Ex 7.1
    • Ex 7.2
    • MCQs
    • Ex. 7.1 NCERT Solutions
    • Ex. 7.2 NCERT Solutions
    • Close
  • Comparing Quantities
    • Ex 8.1
    • Ex 8.2
    • Ex 8.3
    • MCQs
    • Ex. 8.1 NCERT Solutions
    • Ex. 8.2 NCERT Solutions
    • Ex. 8.3 NCERT Solutions
    • Close
  • Rational Numbers
    • Ex 9.1
    • Ex 9.2
    • MCQs
    • Ex. 9.1 NCERT Solutions
    • Ex. 9.2 NCERT Solutions
    • Close
  • Practical Geometry
    • Ex 10.1
    • Ex 10.2
    • Ex 10.3
    • Ex 10.4
    • Ex 10.5
    • MCQs
    • Ex. 10.1 NCERT Solutions
    • Ex. 10.2 NCERT Solutions
    • Ex. 10.3 NCERT Solutions
    • Ex. 10.4 NCERT Solutions
    • Ex. 10.5 NCERT Solutions
    • Close
  • Perimeter and Area
    • Ex 11.1
    • Ex 11.2
    • Ex 11.3
    • Ex 11.4
    • MCQs
    • Ex. 11.1 NCERT Solutions
    • Ex. 11.2 NCERT Soluions
    • Ex. 11.3 NCERT Solutions
    • Ex 11.4 NCERT Solutions
    • Close
  • Algebraic Expressions
    • Ex 12.1
    • Ex 12.2
    • Ex 12.3
    • Ex 12.4
    • MCQs
    • Ex. 12.1 NCERT Solutions
    • Ex. 12.2 NCERT Solutions
    • Ex. 12.3 NCERT Solutions
    • Ex. 12.4 NCERT Solutions
    • Close
  • Exponents & Powers
    • Ex 13.1
    • Ex 13.2
    • Ex 13.3
    • MCQs
    • Ex. 13.1 NCERT Solutions
    • Ex. 13.2 NCERT Solutions
    • Ex. 13.3 NCERT Solutions
    • Close
  • Symmetry
    • Ex 14.1
    • Ex 14.2
    • Ex 14.3
    • MCQs
    • Ex. 14.1 NCERT Solutions
    • Ex. 14.2 NCERT Solutions
    • Ex. 14.3 NCERT Solutions
    • Close
  • Visualising Solid Shapes
    • Ex 15.1
    • Ex 15.2
    • Ex 15.3
    • Ex 15.4
    • MCQs
    • Ex. 15.1 NCERT Solutions
    • Ex. 15.2 NCERT Solutions
    • Ex. 15.3 NCERT Solutions
    • Ex. 15.4 NCERT Solutions
    • Close

Class 7 Ex. 14.1 Maths NCERT Solutions

NCERT Solutions for Class 7 Maths Chapter 14 Symmetry Ex 14.1

Ex 14.1 Class 7 Maths Question 1.
Copy the figures with punched holes and find the axis of symmetry for the following:

Solution:

The axis of symmetry is shown by following line.

Ex 14.1 Class 7 Maths Question 2.
Give the line(s) of symmetry, find the other hole(s):

Solution:

Ex 14.1 Class 7 Maths Question 3.
In the following figures, the mirror line (i.e., the line of symmetry) is given as dotted line. Complete each figure performing reflection in the dotted (mirror) line. (You might perhaps place a mirror along the dotted line and look into the mirror for the image). Are you able to recall the name of the figure you complete?

Solution:

Following are the complete figures.

Ex 14.1 Class 7 Maths Question 4.
The following figures have more than one line of symmetry. Such figures are said to have multiple lines of symmetry.

Identify multiple lines of symmetry, if any, in each of the following figures:

Solution:

Here, figure (6), (d), (e), (g) and (h) are the multiple lines of symmetry.

Ex 14.1 Class 7 Maths Question 5.
Copy the figure given here.
Take any one diagonal as a line of symmetry and shade a few more squares to make the figure symmetric about a diagonal. Is there more than one way to do that? Will the figure be symmetric about both the diagonals?

Solution:

(i) Let us take a diagonal as the axis of symmetry and shade the square as shown in the figure.

(ii) Yes, there are more than the line of symmetry i.e. BD, EF and GH.
(iii) Yes, the figure is symmetric about both the diagonals.

Ex 14.1 Class 7 Maths Question 6.
Copy the diagram and complete each shape to be symmetric about the mirror line(s).

Solution:

Ex 14.1 Class 7 Maths Question 7.
State the number of lines of symmetry for the following figures:

(а) An equilateral triangle

(b) An isosceles triangle

(c) A scalene triangle

(d) A square

(e) A rectangle

(f) A rhombus

(g) A parallelogram

(h) A quadrilateral

(i) A regular hexagon

(j) A circle

Solution:

 

FigureNumber of lines of symmetry
(a) An equilateral triangle3
(6) An isosceles triangle1
(c) A scalene triangle0
(d) A square4
(e) A rectangle2
(f) A rhombus2
(g) A parallelogram0
(h) A quadrilateral0
(i) A regular hexagon6
(j) A circleInfinite

Ex 14.1 Class 7 Maths Question 8.
What letters of the English alphabet have reflectional symmetry (i.e. symmetry related to mirror reflection) about

(а) a vertical mirror

(b) a horizontal mirror

(c) both horizontal and vertical mirrors.

Solution:

(a) Alphabet of vertical mirror reflection symmetry are
A, H, I, M, O, T, U, V, W, X, Y
(b) Alphabet of horizontal mirror reflection symmetry are:
B, C, D, E, H, I, K, O, X
(c) Alphabet of both horizontal and vertical mirror reflection symmetry are:
H, I, O, X.

Ex 14.1 Class 7 Maths Question 9.
Give three examples of shapes with no line of symmetry.

Solution:

Example 1: Scalene triangle has no line of symmetry.
Example 2: Quadrilateral has no line of symmetry.
Example 3: Alphabet R has no line of symmetry.

Ex 14.1 Class 7 Maths Question 10.
What other name can you give of the line of symmetry of
(a) an isosceles triangle?

(b) a circle?

Solution:

(a) Median of an isosceles triangle is its line of symmetry.
(b) Diameter of a circle is its line of symmetry.

Android App

eVidyarthi

Search On eVidyarthi

Evidyarthi on Facebook

Like us on Facebook

Follow Evidyarthi on Youtube

Learn English
Learn English Through हिन्दी
Job Interview Skills
English Grammar
हिंदी व्याकरण - Vyakaran
Mathematics Class 6th
Science Class 6th
हिन्दी Class 6th
Mathematics Class 7th
Science Class 7th
हिन्दी Class 7th
Mathematics Class 8th
Science Class 8th
हिन्दी Class 8th
Mathematics Class 9th
English Class 9th
Science Class 9th
Mathematics Class 10th
English Class 10th
Mathematics Class XI
Chemistry Class XI
Accountancy Class 11th
Accountancy Class 12th
Mathematics Class 12th
Microsoft Word
Microsoft Excel
Microsoft PowerPoint
Adobe PhotoShop
Adobe Illustrator
Learn German
Learn French
IIT JEE
Privacy Policies, Contact Us
Copyright © 2020 eVidyarthi and its licensors. All Rights Reserved.