question_answer 1)

What letters of the English alphabet have reflectional   symmetry (i.e., symmetry related to mirror reflection) about (a) a vertical mirror ; (b) a horizontal mirror; (c) both horizontal and vertical mirrors.

Answer:

                (a) A, H, I, M, O, T, U, V, W, X, Y (b) B, C, D, E, H, I, O, X (c) H, I, O, X;