Page 255 - Ganit Kaushal

8. State whether the following statements are true (T) or false (F).
(a) A kite has two lines of symmetry.

(b) A circle has only 16 lines of symmetry.
(c) A parallelogram has no line of symmetry.
(d) A square and a rectangle have the same number of lines of symmetry.
(e) A regular octagon has 10 lines of symmetry.
(f) Every diameter in a circle is a line of symmetry.
9. Fill in the blanks.

(a) Regular polygons have equal sides and equal angles. They have _________ lines of symmetry.
(b) The number of lines of symmetry of a square is _________.
(c) The number of lines of symmetry of an equilateral triangle is _________.
(d) The number of lines of symmetry in a regular polygon of n sides is _________.
(e) The number of capital letters of the English alphabet having both horizontal and vertical lines
of symmetry is _________.
(f) A 30°-60°-90° set-square has _________ line(s) of symmetry.
There are four options (Q.10 to Q.19), out of which only one is correct. Choose the correct option.
10. In the following figures, the figure that is not symmetric with respect to any line is

(a) (b) (c) (d)

11. The number of lines of symmetry in a scalene triangle is
(a) 0 (b) 1 (c) 2 (d) 3
12. The number of lines of symmetry in a circle is

(a) 0 (b) 2 (c) 4 (d) more than 4
13. Which of the following letters does not have a vertical line of symmetry?
(a) M (b) H (c) E (d) V
14. Which of the following letters have both horizontal and vertical lines of symmetry?
(a) X (b) E (c) M (d) K
15. The number of lines of symmetry in a protractor is

(a) 0 (b) 1 (c) 2 (d) more than 2
16. The number of lines of symmetry in a pair of compasses is
(a) 0 (b) 1 (c) 2 (d) 3
17. An equilateral triangle has
(a) no line of symmetry (b) one line of symmetry
(c) three lines of symmetry (d) two lines of symmetry
18. The line of symmetry of the set square 45°-90°-45° is the

(a) angle bisector of 45° (b) angle bisector of 90°
(c) perpendicular bisector of the longest side (d) none of these
19. The number of lines of symmetry in a divider is
(a) 0 (b) 1 (c) 2 (d) 3

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