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\ 06-Nov-2024 Bharat Arora Proof-8 Reader’s Sign _______________________ Date __________

Chapter assessment
A. Choose the correct option.

1. Which of the following letters have both horizontal and vertical lines of symmetry?
(a) X (b) E (c) M (d) K
2. Which of the following letters does not have any line of symmetry?

(a) V (b) S (c) T (d) O
3. The order of rotational symmetry in the adjoining figure is
(a) 2 (b) 4 (c) 6 (d) 8

4. The number of lines of symmetry in a compass is
(a) 3 (b) 2 (c) 1 (d) 0
5. The number of lines of symmetry in a 45°–45°–90° set-square is
(a) 0 (b) 1 (c) 2 (d) 3

6. Which of the following pair shows reflections of each other?
(a) (b) (c) (d)

7. What will be the mirror image of ‘W’ when we place the mirror vertically?
(a) M (b) U (c) A (d) None of these
8. If a line segment of length 12 cm is reflected about a mirror line, then its reflection (image) is a line
segment of length ................ .
(a) 3 cm (b) 6 cm (c) 9 cm (d) 12 cm

9. The order of rotational symmetry of a semi-circle is ................ .
(a) 1 (b) 2 (c) 3 (d) Infinite
10. An arrowhead has ................. line(s) of symmetry.

(a) 1 (b) 2 (c) 3 (d) 4
B. Assertion and Reason Type Questions.
In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R).
Choose the correct option.
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).

(c) Assertion (A) is true but Reason (R) is false.
(d) Assertion (A) is false but Reason (R) is true.
1. Assertion (A): A parallelogram has a rotational symmetry of order 2.

Reason (R): A parallelogram can be rotated by 180° to look the same.
2. Assertion (A): An equilateral triangle has three lines of symmetry.
Reason (R): The lines of symmetry of a shape always pass through its vertices.

3. Assertion (A): A regular pentagon has five lines of symmetry.
Reason (R): A regular polygon has as many lines of symmetry as the number of sides.

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