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First of all you need to show that the figure is a quadrilateral. After that, there are many different way and these depend on the information that is given. You could show that :

  • the two pairs of opposite sides are parallel,
  • the two pairs of opposite sides are of equal length,
  • the squares on the four sides equals the squares on the two diagonals,
  • the two diagonals bisect one another,
  • the two pairs of opposite angles are equal,
  • any angle is supplementary to the two adjacent angles.
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Wiki User

9y ago

What else can I help you with?