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Refering to the attachment, we have set of points A,B,C,D which intersects at a point (Refer Figure)

I have written a forumla in excel to calculate distance d1,d2,d3,d4 from this intersection point.

How would i know that d2 distance is negative ( or in a reverse position) without actually comparing the X,Y positions with respect to Intersection Point.

Is there any other way to do it. ?

Thanks

Zirok

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# How to know direction of point

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