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John McClane · Answer 1 · 2017-05-07T13:45:39+0000

Answer:

and only if they have the same slope. Any two vertical lines are parallel. Therefore, the slope of AB is -8 if AB is parallel to CD.

Explanation:

AXheladini · Answer 2 · 2017-05-13T04:35:46+0000

Parallel Lines Theorem Two coplanar nonvertical lines are parallel if and only if they have the same slope. Any two vertical lines are parallel. Therefore, the slope of AB is -8 if AB is parallel to CD.

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