Mathematics for IGCSE & O level - Transformations (Section 1 - No. 49)
How does the position of a point on the shape compare to the position of the point on the image after reflection?
They have the same coordinates.
They are on the opposite sides of the mirror line.
They are the same distance from the mirror line, but on the same side.
They are in the same position.
Explication
The corresponding points are always on opposite sides of the mirror line in a reflection.