the letters are : E
Vertical lines of symmetry: A, H, I, M, O, T, U, V, W, X, Y Horizontal lines of symmetry: B, C, D, E, H, I, K, O, X Other: O
letter o and x
A, B, C, D, E, H, I, M, N, O, T, U, V, W, X, Y all have symmetry either vertical or horizontal
Seven
the letters are : E
Vertical lines of symmetry: A, H, I, M, O, T, U, V, W, X, Y Horizontal lines of symmetry: B, C, D, E, H, I, K, O, X Other: O
letter o and x
A, B, C, D, E, H, I, M, N, O, T, U, V, W, X, Y all have symmetry either vertical or horizontal
H,I,O,X,
Seven
Capital h, i, o, t, x.
o x l I
H,I,O,X Note that if you draw "O" as a perfect circle, it will have infinitely many lines of symmetry.
Lower case "o" and "x" both have two lines of symmetry. Upper case letters with two lines of symmetry are: "O," "X," "H" and "I."
ALL letters have at least one line of rotational symmetry. However - if you mean reflective symmetry, the letters F, G, J, L, P, Q, R, S, & Z do not.
As with the Roman alphabet, which you may be familiar with it (since you are using it to read this answer), different letters have different symmetries.