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9. Complete each of the following shapes to be symmetric about the mirror line(s):

10. The Universal Recycling symbol is rendered with a black outline and green fill and
is internationally recognized for recycling activity. Both filled and outline versions
are in use. To raise awareness of environmental issues, a contest on designing the CASE STUDY
Universal designing symbol was won by a 23- year old university student named
Gary Anderson. The logo is usually displayed with the arrows circulating clockwise.
The triangle is made up of three arrows drawn as a continuous loop.
Answer the following questions:

1. How many times does this logo coincides with one full rotation in clockwise direction?
2. How many times does this logo coincides with one full rotation in anti-clockwise
direction?
3. Two students discuss the order of rotational symmetry of the recycling logo. Rini says,
it is 2, while Rana says, it is 3. Who is correct? Justify the correct answer.

Brain Sizzlers
A ceiling fan of 4 blades rotates around its axis and passes through its centre. What is the angle and order
of rotational symmetry of a ceiling fan when seen from directly under the fan?

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