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17.6.20

LO: To identify lines of symmetry in 2-D shapes presented in different orientations.

DivingLines of Symmetry

Identify the lines of symmetry in these shapes.

Are these lines of symmetry all correct?

DivingLines of Symmetry

Are any missing?

Are these statements always, sometimes or never true?

DeeperLines of Symmetry

• A pentagon has five lines of symmetry.

• A square has four lines of symmetry.

• A scalene triangle has three lines of symmetry.

Sometimes

Always

Never

Why is this shape not symmetrical?

DeeperLines of Symmetry

Because the leaf curls in one direction, it does not have reflective symmetry.

If we looked with a mirror, it would not be the same on both sides.

Deepest

Shapes with both a horizontal and vertical

line of symmetry always have diagonal lines of

symmetry, just like this one here.

Is Anja correct?

Lines of Symmetry

No, here are some examples of shapes with vertical and horizontal lines of symmetry but no others:

Dive in by completing your own activity!

Lines of Symmetry

Complete the worksheets attached-do Diving and Deeper. As a challenge, try the Deepest section.

The answers are available for you to check but please have a go first.