Respuesta :
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.
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.
Step-by-step explanation: