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Quick Check
Order of rotational symmetry is 1
2. (a) (b) Think and Answer
(a) 2 (b) 2 (c) 2
Think and Answer
Lines of symmetry = 6, order of rotational symmetry = 6
(c) (d) Practice Time 11B
1. (a) Two (b) Four (c) 1
(d) Two (e) 1
2. (a) Two (b) Four (c) Six (d) Four
3. (a) (b) 3. S. No. Lines of Symmetry Order of Rotational Symmetry
(a) 0 2
(b) 0 4
(c) (d) (c) 0 2
(d) 0 4
(e) 5 5
(f) 6 6
Maths Connect
4. (a) (b)
Alphabets Line of Number Rotational Order of
Symmetry of Line of Symmetry Rotational
Symmetry Symmetry
C Yes 1 Yes 1
N No 0 Yes 2
(c) (d) O Yes 2 Yes 2
E Yes 1 Yes 1
H Yes 2 Yes 2
Z No 0 Yes 2
S No 0 Yes 2
(e) (f)
Mental Maths
1. 2 2. 3 3. No 4. Infinite 5. BOOK, DICE, HOOK
Chapter Assessment
A. 1. (d) 2. (b) 3. (d) 4. (c) 5. (b)
5. (a) (b) B. 1. (a) 2. (a) 3. (b)
C. Figure Line of Number Rotational Order of
Symmetry of Line of Symmetry Rotational
Symmetry Symmetry
Parallelogram No 0 Yes 2
(c) (d) Semi-Circle Yes 1 Yes 1
Trapezium No 0 Yes 1
Isosceles Triangle Yes 1 Yes 1
Regular Octagon Yes 8 Yes 8
(e)

D. 1. (a) (b)

0 line of symmetry
6. (a) (b) 4 lines of symmetry

(c) (b)

0 line of symmetry
(c)
6 lines of symmetry

7. (a) Two (b) one (c) One (d) Ten
(e) Zero (f) Four 2. (a) (b)
8. Parallelogram, Scalene triangle, Trapezium.
Think and Answer
(b) Anticlockwise

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