Page 248 - Start Up Mathematics_6

(g) (h) (i)

Solution: Number of lines of symmetry are as follows:
(a) 4 (b) 0 (c) 4 (d) 2 (e) 3
(f) 2 (g) 0 (h) 0 (i) 4

Example 8: Copy each figure on a squared sheet of paper. Identify its shape and draw the line(s)
of symmetry, if any.

(a) (b) (c)

Solution: (a) A scalene triangle: It has no line of symmetry. l m

(b) An isosceles triangle: It has one line of symmetry,
i.e., l.
(c) A kite: It has one line of symmetry, i.e., m.

Example 9: Complete the following table.

Shape Rough sketch Number of lines of symmetry

An equilateral triangle 3

A line segment

An isosceles trapezium

A sector of a circle

A rhombus

A regular heptagon

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