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Plane equation with 3 points

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Three points define a plane. A normal vector can be derived from these three points by computing two vectors from these three points and getting the cross product of these two vectors. The derived normal is = {A,B,C}. Now, take any one of your three points, and create the value d = Ax + By + Cy where {x,y,z} is any one of your three points. Now, create the value D = -d. We now have our plane equation Ax + Bx + Cx + D = 0.

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