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11 Symmetry

Learning Objectives

After studying this chapter, students will be able to... Scan to learn
 explain and identify the line of symmetry of various objects and geometrical figures
 explain the reflection or mirror line symmetry
 define and identify the objects having rotational symmetry
 find the order of rotational symmetry of various geometric shapes

GET READY!

On National Energy Conservation Day, a school trip for class VII students was held to a wind farm.

Students! These are the windmills Yes, they have rotational
that create wind energy, which is symmetry at different
clean and renewable energy source rotation angles.
that helps to avoid millions of metric
tons of carbon emissions annually.

Look at these shapes,
they look the same in
every turn. Are they
symmetric?

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