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Area and similitude
Two mirrors at 45° to highlight the fact that by doubling the side of a square you get a ...
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Rotation axes of the cube
Two mirrors at a particular angle show the rotation axes of the cube: here we see two mirr...
Planes of symmetry of a cube
A cube has nine symmetry planes: three planes which are parallel to a couple of opposite ...
Which is the shortest way from a point A to another point B (A and B are on the same semip...
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