SOLUTION: Show in two ways that the quadrilateral with vertices (0, -1) (1, 2) (-4, 7) and (-5, 4) is a parallelogram.

Question 1139121: Show in two ways that the quadrilateral with vertices (0, -1) (1, 2) (-4, 7) and (-5, 4) is a parallelogram.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Show in two ways that the quadrilateral with vertices (0, -1) (1, 2) (-4, 7) and (-5, 4) is a parallelogram.
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Label the points A(0,-1), B(1,2), C(-4,7) and D(-5,4)
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The points are in order around the figure.
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Method 1:
If the lengths of AB and CD are equal, and BC and AD are equal, it's a p-gram.
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Method 2:
If AB is parallel to CD and BC is parallel to AD, it's a p-gram.

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