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Mathematics
Mathematics
Problem
Given the points
A
(
1
,
2
,
3
)
A(1,2,3)
A
(
1
,
2
,
3
)
,
B
(
4
,
2
,
7
)
B(4,2,7)
B
(
4
,
2
,
7
)
and
C
(
1
,
6
,
3
)
C(1,6,3)
C
(
1
,
6
,
3
)
, at which vertex is
△
A
B
C
\triangle ABC
△
A
B
C
right-angled? a)
C
C
C
b) The triangle is not right-angled c)
A
A
A
d)
B
B
B
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