How can we calculate the angle between two lines without having to calculate the slope?

55 Views|Posted 2011-06-15 22:16:51

Asked by Asacccaccsa

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Answered by

Manish Ramachandran | Contributor-Level 10

2011-06-15 22:21:47

I have two Lines: L1 and L2. I want to calculate the angle between the two lines. L1 has points: {(x1, y1), (x2, y2)} and L2 has points: {(x3, y3), (x4, y4)}. How can I calculate the angle formed between these two lines, without having to calculate the slopes? The problem I am currently having is th