Given two lines L1 and L2, How can I determine whether they are parallel or not? Here L1 contains (x1,y1)(x2,y2) and L2 contains (X3,y3)(x4,y4)
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Given two lines L1 and L2, How can I determine whether they are parallel or not? Here L1 contains (x1,y1)(x2,y2) and L2 contains (X3,y3)(x4,y4)
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