The answer depends of the font.
In broad terms, in the upper case letters:
F, G, J, L, P, Q and R.
The others have reflective (or line) symmetry, or they have rotational symmetry, or both.
Letters that have a vertical line symmetry: WTYUIOAHXVM Letters that have a horizontal Line symmetry: EIODHKCB
all letters have a line of symmetry
bcdefgjklpqr
The letters with half turn symmetry in the alphabet are.......H, I, N, O, S, X, and Z.
The letters H and Z have both line symmetry and rotational symmetry
Letters that have a vertical line symmetry: WTYUIOAHXVM Letters that have a horizontal Line symmetry: EIODHKCB
all letters have a line of symmetry
The letters S and N have point symmetry but not line symmetry.
bcdefgjklpqr
There are 11 letters with only one line of symmetry.
It has 1 vertical line of symmetry
Of the the seven letters, ABCDEFG, F and G have no lines of symmetry. However,Êall of them could have lines of symmetry if theyÊwere presented in three dimensions.
H,i,o,x
A letter I i.
The letters H and Z have both line symmetry and rotational symmetry
The letters with half turn symmetry in the alphabet are.......H, I, N, O, S, X, and Z.
Letters with both horizontal and vertical symmetry are: (lower case) - lox (upper case) - HIOX