ANSWER KEY -
Multiple Choice questions:
1. (a) 1
2. (b) 2
3. (d) 4
4. (c) 3
5. (a) 1
6. (d) no line of symmetry
7. (d) Countless.
8. (a) 0
9. (b) 2
10. (d) 6
11. (a) C
12. (d) E.
13. (c) D
14. (d) T.
15. (d) M.
Match The Following:
Fill in the blanks:
1. The geometrical figure Rectangle or Rhousbus has 2 lines of symmetry.
2. The alphabet ‘A’ has Vertical-One line of symmetry.
3. The circle has Infinite line of symmetry.
4. The flower which has lines of symmetry is Sunflower.
True /False:
1. False
2. False
3. True
4. True
Very Short Answer:
1. Gram and moong
2. Another name of line of symmetry is axis of symmetry.
3. The letters O, M, H, T, V and X look the same after reflections because these
letters have 1 vertical line of symmetry.
4.
5.
6. Yes, all the butterfly have the line of symmetry.
Rough figure and axis of symmetry is as follows:
7. Symmetry refers to the exact match in shape and size between two halves of an object.
It shows the proportional. There are three types of symmetry-
(i) Line of symmetry or axis of symmetry
(ii) Mirror symmetry
(iii) Rotational symmetry
8. The 4 English letters having no line of symmetry are: P, F, G and Z.
9. The required letters are:
E, B, C, D,K
10. The required English letters are A, H, I, M
Short Answer:
1. (a) The figure is a square. It has 4 lines of symmetry.
(b) It is an isosceles triangle. It has one vertical line of symmetry.
(c) The given figure is a rectangle which has two lines of symmetry.
2. (a) The dotted line is a line of symmetry.
(b) The dotted line is a line of symmetry.
(c) The dotted line is not a line of symmetry.
(d) The dotted line is not a line of symmetry.
(e) The dotted line is a line of symmetry.
(f) The dotted line is a line of symmetry
3.(a) Rectangle has two lines of symmetry
(i) Horizontal
(ii) Vertical
(b) Square has four lines of symmetry.
(i) 1 horizontal
(ii) 1 vertical
(iii) 2 diagonally
(c) Parallelogram has no lines of symmetry
Right angled triangle has no line of symmetry.
4.
5. (a) This is symmetrical
(b) This is symmetrical
(c) This is not symmetrical
(d) This is symmetrical
(e) This is not symmetrical
(f) This is symmetrical
Long Answer:
1.(a) This figure has line of symmetry as L
(b) This figure has line of symmetry as M
(c) This figure has line of symmetry as N
(d) There is no line of symmetry
2. (a) Isosceles Triangle
Number of lines of Symmetry: 1
(b) It is not possible to draw which has two lines of symmetry
(c) Equilateral Triangle
(d) Scalene triangle where all sides are different
3.(a) A,H,I,M,O,T,U,V,W,X,Y
(b) B,C,D,E,H,I,K,O,X
(c) F,G,J,L,N,P,Q,R,S,Z
Assertion and Reason Answers:
(1) (a) Both A and R are true and R is the correct explanation of A
(2) (a) Both A and R are true and R is the correct explanation of A