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Explore Riana’s idea. What do you notice? What could you show Riana to help explain your thinking?
Reflective symmetry
We can see reflective symmetry in nature and in other shapes or patterns. The images can be folded along the lines of symmetry and the two parts will match exactly.
We can also put a mirror along this line and the reflection will complete the shape or pattern exactly. We call this the mirror line. The butterfly has a vertical line of symmetry. How can you describe the other lines of symmetry shown here?
Here are some part shapes that Leon has drawn. Complete the shape, thinking about the line of symmetry.
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