NCERT Class 7 Maths Chapter 14 Symmetry Exercise 14.1


Chapter 14  Symmetry Exercise 14.1

Question 1: Copy the figures with punched holes and find the axes of symmetry for the following:
(a)

Answer:

(b)

Answer:


(c)

Answer:

(d)

Answer:



(e)

Answer:


(f)

Answer:


(g)

Answer:


(h)

Answer:



(i)

Answer:


(j)

Answer:


(k)


Answer:

(l)


Answer:


Question 2: Given the line(s) of symmetry, find the other hole(s):
(a)

Answer:


(b)

Answer:

(c)


Answer:

(d)
Answer:

(e)

Answer:


Question 3: In the following figures, the mirror line (i.e., the line of symmetry) is given as a 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?
(a)
Answer:
Name of the figure is square.

(b)
Answer:

Name of the figure is triangle.

(c)
Answer:


Name of the figure is rhombus.

(d)
Answer:


Name of the figure is circle.

(e)
Answer:

Name of the figure is pentagon.

(f)

Answer:

Name of the figure is octagon.

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:
(a)


Answer: The figure given has 3 lines of symmetry. So, it has multiple lines of symmetry.

(b)
Answer:
The figure given has 2 lines of symmetry. So, it has multiple lines of symmetry.

(c)
Answer:
The figure given has 3 lines of symmetry. So, it has multiple lines of symmetry.

(d)
Answer:
The figure given has 2 lines of symmetry. So, it has multiple lines of symmetry.

(e)
Answer:

The figure given has 4 lines of symmetry. So, it has multiple lines of symmetry.

(f)
Answer:

The figure given has only 1 line of symmetry.

(g)
Answer:

The figure given has 4 lines of symmetry. So, it has multiple lines of symmetry.

(h)
Answer:

The figure given has 6 lines of symmetry. So, it has multiple lines of symmetry.

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?

Answer:

Yes, the figure will be symmetrical about both diagonals.

Yes, the figure can be made symmetrical by more than one way.

Question 6: Copy the diagram and complete each shape to be symmetric about the mirror line(s):
(a)

Answer:

(b)

Answer:

(c)

Answer:

(d)

Answer:


Question 7: State the number of lines of symmetry for the following figures:
(a) An equilateral triangle
Answer:
An equilateral triangle has 3 lines of symmetry.

(b) An isosceles triangle
Answer:
An isosceles triangle has 1 lines of symmetry.

(c) A scalene triangle
Answer:
A scalene triangle has no line of symmetry.

(d) A square
Answer:
A square has 4 lines of symmetry.

(e) A rectangle
Answer:
A rectangle has 2 lines of symmetry.

(f) A rhombus
Answer:
A rhombus has 2 lines of symmetry.

(g) A parallelogram
Answer:
A parallelogram has no line of symmetry.

(h) A quadrilateral
Answer:
A quadrilateral has no line of symmetry.

(i) A regular hexagon
Answer:
A regular hexagon has 6 lines of symmetry.

(j) A circle
Answer:
A circle has infinite lines of symmetry.

Question 8: What letters of the English alphabet have reflectional symmetry (i.e., symmetry related to mirror reflection) about.
(a) A vertical mirror
(b) A horizontal mirror
(c) Both horizontal and vertical mirrors
Answer:
a) A vertical mirror - A, H, I, M, O, T, U, V, W, X, Y
b) A horizontal mirror - B, C, D, E, H, I, K, O, X
c) Both horizontal and vertical mirrors - H, I, O, X

Question 9: Give three examples of shapes with no line of symmetry.
Answer:
A scalene triangle, a quadrilateral and a parallelogram

Question 10: What other name can you give to the line of symmetry of
(a) An isosceles triangle?
Answer:
The other name to the line of symmetry of an isosceles triangle is median or an altitude.

(b) A circle?
Answer:
The other name to the line of symmetry of a circle is diameter.

No comments:

Post a Comment

Also read!

Click on any of the below text for additional links:

Class 6

Class 6 Computer Kips Solutions
Class 6 Gul Mohar English Solutions
→ Class 6 Map Pointing Solutions
Class 6 NCERT Civics Solutions
Class 6 NCERT Geography Solutions
Class 6 NCERT History Solutions
Class 6 NCERT Maths Solutions
Class 6 NCERT Science Solutions

Class 7

Class 7 Computer Kips Solutions
Class 7 Gul Mohar English Solutions
English Grammar Class 7
English Writing Skills Class 7
Class 7 Map Pointing Solutions
Class 7 NCERT Civics Solutions
Class 7 NCERT Civics Notes
Class 7 NCERT Civics Extra Questions
Class 7 NCERT Geography Solutions
Class 7 NCERT Geography Notes
Class 7 NCERT Geography Extra Questions
Class 7 NCERT History Solutions
Class 7 NCERT History Notes
Class 7 NCERT History Extra Questions
Class 7 NCERT Maths Solutions
Class 7 NCERT Science Solutions
Class 7 NCERT Science Notes
Class 7 NCERT Science Extra Questions

Class 8

Class 8 Kips Artificial Intelligence Solutions
Class 8 Gul Mohar English Solutions
English Grammar Class 8
English Writing Skills Class 8
Class 8 Map Pointing Solutions
Class 8 NCERT Civics Solutions
Class 8 NCERT Civics Notes
Class 8 NCERT Civics Extra Questions
Class 8 NCERT Geography Solutions
Class 8 NCERT Geography Notes
Class 8 NCERT Geography Extra Questions
Class 8 NCERT History Solutions
Class 8 NCERT History Notes
Class 8 NCERT History Extra Questions
Class 8 NCERT Maths Solutions
Class 8 NCERT Science Solutions
Class 8 NCERT Science Notes
Class 8 NCERT Science Extra Questions
Class 8 NCERT Science Exemplar
Class 8 NCERT Science MCQs

Class 9

Class 9 Kips Artificial Intelligence Solutions
Class 9 Map Pointing Solutions
Class 9 NCERT Civics Solutions
Class 9 NCERT Geography Solutions
Class 9 NCERT History Solutions
Class 9 NCERT Maths Solutions
Class 9 NCERT Science Solutions

Class 10

Class 10 Kips Artificial Intelligence Solutions
Class 10 NCERT English Solutions
→ Class 10 Map Pointing Solutions
Class 10 NCERT Civics Solutions
Class 10 NCERT Civics Notes
Class 10 NCERT Civics Extra Questions
Class 10 NCERT Geography Solutions
Class 10 NCERT Geography Notes
Class 10 NCERT Geography Extra Questions
Class 10 NCERT History Solutions
→ Class 10 NCERT History Notes
Class 10 NCERT History Extra Questions
Class 10 NCERT Maths Solutions
Class 10 NCERT Science Solutions
Class 10 NCERT Science Notes
Class 10 NCERT Science Extra Questions

Computer Languages

Python Basics

Extra Activities

Extra Activities

Extra Knowledge

Extra Information
General Knowledge
Historical Places in India
Latest technology
Physical Sciences
Facts

• Mathematics quick links
Mathematical Terms
Maths Tricks

Home Top