Question

What letters of the English alphabet have reflection symmetry about a horizontal mirror?

Answer 1

Prerequisite: The letters which do not change after taking a reflection in a horizontal mirror are called to have a reflection symmetry in a horizontal mirror.

Finding the letters which have reflection symmetry about a horizontal mirror:

Letters with reflection symmetry about a horizontal mirror are shown in the figure below:

The figure shows that the letters are not changed after taking reflection in a horizontal plane mirror:

Hence,$B,C,D,E,H,I,K,OandX$ are the letters of the English alphabet that have reflection symmetry about a vertical mirror.