Questo cartello ha una simmetria diedrale, di tipo D4, come quella di un quadrato.
Questo cartello ha una simmetria diedrale, di tipo D2, come quella di un rettangolo.
Rosone con simmetria ciclica di tipo C3 su un segnale stradale.
This road sign is an example of rosette with dihedral symmetry of type D2.
Horizontal road signs: the image is very elongated, so that it can be seen rightly, as in ...
Horizontal road signs: the image is very elongated, so that it can be seen rightly, as in ...
Vertical road signs: the same image is elongated when reproduced in a horizontal road sign...
Horizontal road signs: the image is very elongated, so that it can be seen rightly, as in ...
This road sign is an example of rosette with dihedral symmetry of type D2.
