1
Q
n1x + n2y + n3z + d = 0
where
A
d = -(a.n)
2
Q
a =
A
(a1)
(a2)
(a3)
the position vector of a point on the plane
3
Q
n =
A
n1
n2
n3
a vector perpendicular to the plane
4
Q
The angle between two planes is the same as
A
the angle between the normal vectors for the two planes.
further
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