Question 19.57

27. Which of the capital letters of the alphabet, when drawn in the most symmetrical way, have the following symmetries? For example, assume that the upper and lower loops of B are the same size.

  1. A horizontal line of reflection symmetry
  2. A vertical line of reflection symmetry
  3. A rotational symmetry

27.

(a) B, C, D, E, H, I, K, O, X

(b) A, H, I, M, O, T, U, V, W, X, Y

(c) H, I, N, O, S, X, Z