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Reflection Builder asks you to construct the mirror image of a shape across an axis. Reflection is a distinct operation from rotation — no amount of turning produces a mirror image — and people who are strong at rotation are often surprised by how hard they find this.
A shape and a mirror axis are shown.
Build the reflected version on the other side.
Every cell must be in the correct mirrored position.
Correct builds load a more complex shape.
Axes vary between vertical, horizontal and diagonal.
Mental reflection and handedness reasoning. It is the operation behind reading a map held upside down, or working out which way a mirrored instruction goes.
Work cell by cell from the axis outward. Distance from the axis is preserved exactly.
Left and right swap; distance does not. That single rule solves every vertical-axis case.
For diagonal axes, rows and columns exchange. It is a different rule and it needs its own attention.
Check the outline before the interior. Getting the silhouette right catches most errors early.
In two dimensions a reflection reverses handedness, and rotation preserves it. No rotation will ever do it.
For most people yes, because rotation can be simulated by imagining turning the object and reflection cannot.
The principle is the same — equal distance, opposite side — but rows and columns exchange, which makes it feel quite different.
Measure each cell's perpendicular distance to the axis and place it the same distance on the other side. Slow but exact.