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line calculations using its known coordinates

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Ahmed Galal
Ahmed Galal 2021-5-30
评论： William Rose 2021-5-30
Hello every one
How to calculate the angle between two lines (lines have known coordinates)
Thanks

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William Rose
William Rose 2021-5-30
Suppose slope of line 1 is a1 and slope of line 2 is a2. Then angle of line 1 relative to x axis is theta1=arctan(a1) and angle of line 2 is theta2=arctan(a2). Angle between lines is theta1-theta2.

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