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Answer:
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Answer:
The slope of ​AB¯¯¯¯¯​ is 1, the slope of ​ BC¯¯¯¯¯ ​ is -1/6, the slope of CD¯¯¯¯¯ is 1, and the slope of ​ AD¯¯¯¯¯ ​ is -2/5. Quadrilateral ABCD is not a parallelogram because only one pair of opposite sides is parallel.
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