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Mathematics
Mathematics
Problem
Show that the points
A
(
0
,
1
,
2
)
A(0, 1, 2)
A
(
0
,
1
,
2
)
,
B
(
2
,
−
1
,
3
)
B(2, -1, 3)
B
(
2
,
−
1
,
3
)
and
C
(
1
,
−
3
,
1
)
C(1, -3, 1)
C
(
1
,
−
3
,
1
)
are vertices of an isosceles right-angled triangle.
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