Question 19.72

42. In each of the four accompanying examples, two adjacent triangles of an infinite strip are shown. (Contributed by Margaret A. Owens, California State University, Chico.)

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For each example:

  1. Determine a motion (translation, reflection, rotation, or glide reflection) that takes the first (left) triangle to the second (right) one.
  2. Draw the next four triangles of the infinite strip that would result if the second triangle is moved to the next space by another motion of the same kind, and so on.
  3. Identify (by notation) the resulting strip as one of the seven possible strip patterns.