Reflecting Shapes
This shape explores reflecting shapes. It covers reflecting shapes around a coordinate grid and describing reflections using mirror lines. No prior knowledge is required for this chapter.
In this chapter you’ll explore how to move shapes around a grid using reflections. When reflecting a shape you always need to identify where the mirror line is. For example the grid below shows a shape reflected from a mirror line.
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Lines of reflection
When reflecting shapes you’ll always have to take into account lines to mirror in on the grid. The following shows some of the most common lines which may be used as mirror lines.
The x-axis y = 0
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The y-axis x=0
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Reflecting shapes
The following grids show a shape with a reflection in a reflection line.
in the x-axis
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in the y-axis
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in the line x=-1
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in the line y = -1
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The diagonals y=x and y=-1
Other popular reflection lines that you may be asked to reflect in are the y=x and y=-x
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The following shows reflecting in a diagonal.
Reflected in the line y=x
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Reflected in the line y=-x
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