Yes, of infinite order.
H, I, O, and X have rotational symmetry.
yes it does
I, H, N, O, S, X & Z all have rotational symmetry.
The letters: I O H X o x all exhibit bilateral symmetry and rotational symmetry, with O and X exhibiting it in both upper and lower case.
H,i,o,x
yes, it has a rotational symmetry of 180 degrees, and of course 360. like if you flipped it upside down, then put it on top of the other one it would look the same. just not a lowercase.
H I O
There are 10 letters in the alphabet that achieve rotational symmetry when displayed in their capital form. These letters: A, H, I, M, O, U, V, W, X, and Y.
The letter "O" has rotational symmetry, as it looks the same when rotated 180 degrees.
Well, they all have 360 degree rotational symmetry :P Sorry, not helpful.I think these all do: H, I, K(depending on how you write it), N, O, S, X, ZH, I, O, and X have rotational and reflectional symmetry, and N, S, and X also have rotational.
Infinite.
letter o and x