Punjab State Board PSEB 7th Class Maths Book Solutions Chapter 14 Symmetry Ex 14.1 Textbook Exercise Questions and Answers.
PSEB Solutions for Class 7 Maths Chapter 14 Symmetry Ex 14.1
1. Which of the following figures are asymmetrical ?
Solution:
Figure (a) and (c) are asymmetrical.
2. Draw the lines of symmetry in the following figures.
Solution:
3. Draw all lines of symmetry if any in each of the following figures.
Solution:
4. Copy the figures with punched holes and find the axes of symmetry for the following.
Solution:
5. In the following figures mark the missing holes in order to make them symmetrical about the dotted line.
Solution:
The missing holes are marked by dark punches (small circles) in each of following figures
6. In each of 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 figure you complete.
Solution:
7. Draw the reflection of the following letter in the given mirror line.
Solution:
8. Copy each diagram on a squared paper and complete each shape to be symmetrical about the mirror lines shown dotted.
Solution:
9. State the number of lines of symmetry for the following figures :
(a) A scalene triangle
(b) A rectangle
(c) A rhombus
(d) A parallelogram
(e) A regular hexagon
(f) A circle
Answer:
(a) 0
(b) 2
(c) 2
(d) 0
(e) 6
(f) Infinite.
10. Multiple Choice Questions :
Question (i).
Which of the following triangles have no line of symmetry ?
(a) An equilateral triangle
(b) An Isosceles triangle
(c) A scalene triangle
(d) All of above
Answer:
(a) An equilateral triangle
Question (ii).
What is the other name for a line of symmetry of a circle ?
(a) An arc
(b) A sector
(c) A diameter
(d) A radius
Answer:
(c) A diameter
Question (iii).
How many lines of symmetry does a regular polygon have ?
(a) Infinitely many
(b) As many as its sides
(c) One
(d) Zero
Answer:
(b) As many as its sides
Question (iv).
In the given figure, the dotted line is the line of symmetry which figure is formed if the given figure is reflected in the dotted line fig.
(a) Square
(b) Rhombus
(c) Triangle
(d) Pentagon
Answer:
(b) Rhombus
Question (v).
What is other name for a line of symmetry of an Isosceles triangle ?
(a) Side
(b) Median
(c) Radius
(d) Angle
Answer:
(b) Median
Question (vi).
Which of the following alphabets has a vertical line of symmetry ?
(a) M
(b) Q
(c) E
(d) B
Answer:
(a) M
Question (vii).
Which of the following alphabets has a horizontal line of symmetry ?
(a) C
(b) D
(c) K
(d) All the above
Answer:
(d) All the above
Question (viii).
Which of the following alphabets has no line of symmetry ?
(a) A
(b) B
(c) P
(d) O
Answer:
(c) P