Mathematics for IGCSE & O level - Transformations (Section 6 - No. 8)
A shape is reflected across the line y=x. Which of the following is true about the original shape and its image?
The shape and its image are congruent.
The shape and its image are similar but not congruent.
The shape and its image are in the same orientation.
The size of the shape is changed.
Giải thích
Reflections preserve the size and shape, resulting in congruent figures.