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
(a) A, H, I, M, O, T, U, V, W, X, Y are the letters having areflectional
symmetry about a vertical mirror.
(b) B, C, D, E, H, I, K, O, X are the letters having areflectional symmetry about a horizontal mirror.
(c) H, I, O, X are the letters having a reflectional symmetryabout both the vertical mirror and the horizontal mirror.