Reflection (mirror) symmetry of cube
Materials: 3 mirrors, square fragments, dry erase markers (4 colours)
The mirror shows a plane of reflection symmetry in cube
The mirrors show two mutually perpendicular planes of mirror symmetry in cube
The mirrors show three mutually perpendicular planes of mirror symmetry in cube
Move of one mirror
The mirrors show three planes of mirror symmetry in cube. The planes of mirror symmetry are no longer all perpendicular. Two planes cross at angle 45deg and the third is perpendicular to both.
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