They are H, I, N, O, S, X and Z.
H I O
The rotational symmetry of a plane object is the number of times it will look exactly like its original shape when you rotate it through 360 degrees in its plane. A whole alphabet has no rotational symmetry but some letters in an alphabet may have rotational symmetry. The number of symmetries depends on the alphabet, whether the letters are in upper or lower case as well as the font used.
Eleven of them - AHIMOTUVWXY
Assuming "rotational symmetry" means looks identical when rotated 180 degrees. H I N O S X Z
H, I, O, and X have rotational symmetry.
7 have rot
H i n o s x z
They are H, I, N, O, S, X and Z.
H I O
A B C D E H K M U V W X Y * * * * * What? Most of these letters do not have rotational symmetry and so cannot have rotational AND line symmetry. Or did the meaning of AND change last night? The only upper case letters with both are H, I, O, X
The rotational symmetry of a plane object is the number of times it will look exactly like its original shape when you rotate it through 360 degrees in its plane. A whole alphabet has no rotational symmetry but some letters in an alphabet may have rotational symmetry. The number of symmetries depends on the alphabet, whether the letters are in upper or lower case as well as the font used.
Eleven of them - AHIMOTUVWXY
A figure has rotational symmetry when it can rotate onto itself in less than a full rotation.
Assuming "rotational symmetry" means looks identical when rotated 180 degrees. H I N O S X Z
Seven
Infinite.