Page 136 - Maths Skill - 6

134 Maths

Solution: To find the rotational symmetry, we have to find the angle of rotation = 120°

Order of rotation = 360°
120°
120°
Order of rotation = 3 X A

This shows that if the given figure rotates at 120° around the center then
it has rotational symmetry is of order 3.

Exercise 9.3

1. Which of the following shapes have rotational symmetry?

(i) (ii) (iii) (iv)

(v) (vi) (vii) (viii)

2. Find the order of rotational symmetry as well as its angle of rotation for each figure:

(i) (ii) (iii)

(iv) (v) (vi)