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Mathematics
Mathematics
Problem
Find the area of the triangle whose vertices are
(
2
,
−
1
)
(2,-1)
(
2
,
−
1
)
,
(
5
,
3
)
(5,3)
(
5
,
3
)
and
(
−
1
,
4
)
(-1,4)
(
−
1
,
4
)
.
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