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Plane

 

General equation of plane. Normal vector.

Equation of plane in segments on axes.

Equation of plane going through the given point

and perpendicular to the given vector.

Parametric equation of plane.

Parallelism condition of planes.

Perpendicularity condition of planes.

Distance between two points.

Distance from point to plane.

Distance between parallel planes.

Angle between planes.

 

A general equation of plane:

 

+   +  z +  D = 0 ,

 

where  , B and C  aren't equal to zero simultaneously.

Coefficients , B and C are coordinates of normal vector of  the plane ( i.e. vector, perpendicular to the plane ).

 

At   0,  0,  0 and D 0  we receive an equation of plane in segments on axes:

 

where  a = D / A,  b = D / B,  c = D / C. This plane goes through the points ( a, 0, 0 ), ( 0, b, 0 ) and ( 0, 0, ), i.e. it cuts off segments  a, b and  c  long on the coordinate axes.

 

An equation of plane, going through a point  ( 0 ,   0 ,  z 0 )  and perpendicular to a vector ( , , C ) :

 

( 0 ) + ( 0 ) + ( z z 0 ) = 0 .

 

A parametric equation of plane, passing through a point (0 ,   0 ,  z 0) and two noncollinear vectors (a1 ,  b 1 ,  c 1 )  and (a2 ,  b2 , c2) , set in a rectangular cartesian system of soordinates:

A parallelism condition of planes  + + z+ D = 0  and  E+ F+ Gz+ H = 0 :

 

AF BE = BG CF = AG CE = 0 .

 

A perpendicularity condition of planes + + z+ D = 0 and E+ F+ Gz+ H = 0 :

 

E+ F+ G = 0 .

A distance between two points ( x1 ,  y 1 ,  z1 ) and ( x2 ,  y2 ,  z2) :

A distance from a point  ( 0 ,   0 ,  z 0 )   to a plane   + + z + D = 0 :

A distance between parallel planes A + By + Cz + D = 0 and A + By + Cz + = 0

An angle    between planes  + + z+ D = 0  and  E+ F+ Gz+ H = 0 :

 

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