Discussion
Find the mirror image of the following figure, when the mirror is placed at 'AB' line as shown below.
- A.
- B.
- C.
- D.
Answer: C
The mirror image is figure 3.
The mirror line AB is vertical and stands at the right edge, so the reflection swaps left and right and keeps top and bottom. The four corner symbols therefore change sides in their rows: the filled square goes from top left to top right, the open circle from top right to top left, the open square from bottom left to bottom right and the filled circle from bottom right to bottom left. Inside the triangle, the black wedge at the lower right moves to the lower left, the black sector on the left of the circle moves to the right, the filled up-arrow moves from the left end of the base to the right end and the open down-arrow from the right end to the left.
Figure 1 flips the arrows and corners but leaves the wedge and the circle's black sector on their original sides. Figure 2 has the right positions but swaps the fills of the two arrows. Figure 4 turns the corner symbols through 180 degrees instead of reflecting them, so the symbols sit in the wrong rows.
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