1( 1; 1; z 1), 2( 2; 2; z 2), M 3(x 3; y 3; z 3), . (; ; z) ( 0; 0; z z 0), ( 2 1; 2 1; z 2 z 1), ( 3 1; 3 1; z 3 z 1) . :
= 0.
,
= 0. (1.3)
1 + 1 + 1 z + D 1 = 0,
2 + 2 + 2 z + D 2 = 0.
( 1; 1; 1), ( 2; 2; 2).
, , . . = l l.
.
:
,
l = , .
, . , , , . 0, . . = 0
1 2 + 1 2 + 1 2 = 0.
.
1 + 1 + 1 z + D 1 = 0,
2 + 2 + 2 z + D 2 = 0
,
cosj = = .
-
1.2. , .
|
- (; ; z) = (0; 0; z0) + t.
,
, (1.4)
.
(1.4) t:
t = , t = , t = ,
= = . (1.5)
,
1( 1; 1; z 1) 2( 2; 2; z 2). = ( 2 1; 2 1; z 2 z 1). 1( 1; 1; z 1), (1.5)
. (1.6)
= . ,
|
|
osj = = . (1.7)
:
.
:
l,
. .
. (1.8)