Equation of a Plane

Ax + By + Cz + D = 0

Alternate Form:	     A'x + B'y + C'z +D' = 0
		    where    A' = A/d,   B' = B/d,   C' = C/d,   D' = D/d
		    d = [[radical]](A2 + B2 + C2)

Distance between a point and the plane is given by
A'x + B'y + C'z +D' (sign indicates which side)

Given Ax + By + Cz + D = 0 Then [A, B, C] is a normal vector.