A letter with vertical symmetry (perpendicular to the direction of writing). Exhibit of Si...
The small letters p, q, b, d can be obtained, one from the other, with a certain trick of ...
The different effect of two mirrors on various letters, according to their axis of symmetr...
There are no reflections that fix this word, but a 180° rotation maps it onto itself. Exh...
There are no reflections that fix this number, but a 180° rotation maps it onto itself. E...
There are no reflections that fix this word, but a 180° rotation maps it onto itself. Exh...
There are no reflections that fix this word, but a 180° rotation maps it onto itself. Exh...
There are no reflections that fix this word, but a 180° rotation maps it onto itself. Exh...
There are no reflections that fix this word, but a 180° rotation maps it onto itself. Exh...
