The tessellations are generally made from orthogonal grids (90 ° folds) or triangular grids (60 ° folds in three directions). The basic shapes are the square, the rectangle or the hexagon.
The variety of tessellations is extraordinary.
Most tessellations can be seen in four ways: upside down, upside down, with or without transparency. Great debates sometimes arise to decide what is the front or back ...
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