[
  "Perimeter of a square = 4 x side. So side = perimeter / 4.",
  "Side = 17/20 / 4 = 17/20 x 1/4 = 17/80. 17 and 80 have no common factors, so this is simplest form.",
  "The computed side length is 17/80 m, but this does not match any given option. The options may contain a data-entry error."
]