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Mathematics
Mathematics
Problem
Consider the points
A
(
−
1
,
−
5
,
2
)
A(-1, -5, 2)
A
(
−
1
,
−
5
,
2
)
,
B
(
0
,
−
2
,
3
)
B(0, -2, 3)
B
(
0
,
−
2
,
3
)
, and
C
(
4
,
0
,
−
2
)
C(4, 0, -2)
C
(
4
,
0
,
−
2
)
. a. Find the measure of
B
A
C
^
\widehat{BAC}
B
A
C
. b. Hence find the area of triangle
A
B
C
ABC
A
B
C
.
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