Distance of a point from a plane
Three dimensional plane of Class 11
Distance of a point from a plane
The length of the perpendicular from a point having position vector 
to the plane 
= d is given by
p = 
.
The length of the perpendicular from a point P(x1, y1, z1) to the plane ax + by + cz + d = 0 is given by
p = 
