Page 210 - ICSE Math 8

Figure Lines of symmetry Symmetrical about Diagram

S R
Perpendicular bisectors
(f) Square 4 of two adjacent sides
and two diagonals
P Q

S R
(g) Rhombus 2 The two diagonals
P Q

A

Perpendicular bisectors
(h) Regular pentagon 5 B E
of its sides
D
C

P

Q S
(i) Kite 1 One of its diagonals

R

Infinite lines of Any line passing
(j) Circle
symmetry through its centre O

Perpendicular bisector
(k) Semicircle 1
of diameter
P Q

A
(l) Arrowhead 1 As shown in the figure
C
B D

EXERCISE 19.1

1. Fill in the blanks.
(a) The letter V has __________ line(s) of symmetry.
(b) A scalene triangle has __________ line(s) of symmetry.
(c) A __________ has infinite lines of symmetry.

(d) The letter S has __________ lines(s) of symmetry.

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