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| Question 1054249:  Prove a quadrilateral with vertices G(1,1),H(5,3),I(4,5),J(0,3) is a rectangle.
 Answer by Alan3354(69443)
      (Show Source): 
You can put this solution on YOUR website! Prove a quadrilateral with vertices G(1,1),H(5,3),I(4,5),J(0,3) is a rectangle. ---------------
 Find the slope of GH, HI, IH & JG.
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 If the adjacent lines are perpendicular it's a rectangle.
 If and only if.
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