if WXYZ is a rhombus, then distance ZW = distance WX

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• distance ZW = distance WX, if distance AB = x, then distance BA = x
  • distance WZ = distance WX,

    if the following are true:

    • a = c
    • b = c

    then a = b

    • distance WZ = distance XY, if WXYZ is a parallelogram, then distance WZ = distance XY
      • WXYZ is a parallelogram, if ABCD is a rhombus, then ABCD is a parallelogram
        • WXYZ is a rhombus
    • distance WX = distance XY, if ABCD is a rhombus, then distance AB = distance BC
      • WXYZ is a rhombus