Shape and Space 5

2 marks · Normal

Describe fully the single transformation that maps the triangle with vertices (3, 2), (6, 2), (6, 5) onto the triangle with vertices (–3, 2), (–6, 2), (–6, 5).

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Reflection in the y-axis

Also accept: Reflection about x=0; Reflected in the y-axis

Common mistakes: Reflection in the x-axis

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Marking points

B1 · 1 mark · States that the transformation is a reflection.

A1 · 1 mark · States the correct mirror line (the y-axis or x = 0).

Worked solution

All x-coordinates change sign, indicating reflection in the y-axis (x = 0).