ABCD - параллелограмм
AC∩BD=O
AO=OC
BO=OD
x_{O} = \frac{ x_{A}+ x_{C} }{2} , y_{O} = \frac{ y_{A}+ y_{C} }{y} , z_{O} = \frac{ z_{A}+ z_{C} }{y}x
O
=
2
x
A
+x
C
,y
y
+y
,z
z
+z
O(2;2,5;-1)
2= \frac{ x_{B}+ x_{D} }{2} , 2= \frac{-5+ x_{D} }{2}, x_{D}=92=
B
D
,2=
−5+x
,x
=9
аналогично:
y_{D}=2,5*2-3. y_{D} =2y
=2,5∗2−3.y
=2
z_{D} =-1*2+5. z_{D} =3z
=−1∗2+5.z
=3
D(9;2;3)
ABCD - параллелограмм
AC∩BD=O
AO=OC
BO=OD
x_{O} = \frac{ x_{A}+ x_{C} }{2} , y_{O} = \frac{ y_{A}+ y_{C} }{y} , z_{O} = \frac{ z_{A}+ z_{C} }{y}x
O
=
2
x
A
+x
C
,y
O
=
y
y
A
+y
C
,z
O
=
y
z
A
+z
C
O(2;2,5;-1)
2= \frac{ x_{B}+ x_{D} }{2} , 2= \frac{-5+ x_{D} }{2}, x_{D}=92=
2
x
B
+x
D
,2=
2
−5+x
D
,x
D
=9
аналогично:
y_{D}=2,5*2-3. y_{D} =2y
D
=2,5∗2−3.y
D
=2
z_{D} =-1*2+5. z_{D} =3z
D
=−1∗2+5.z
D
=3
D(9;2;3)