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Mathematics
Mathematics
Problem
The points
A
(
1
,
2
)
A(1,2)
A
(
1
,
2
)
,
B
(
4
,
−
1
)
B(4,-1)
B
(
4
,
−
1
)
and
C
(
k
,
3
k
)
C(k,3k)
C
(
k
,
3
k
)
form a triangle of area
7
7
7
square units. If
k
k
k
is a positive real number, what is the value of
k
k
k
? a)
4
3
\dfrac{4}{3}
3
4
b)
5
12
\dfrac{5}{12}
12
5
c)
23
12
\dfrac{23}{12}
12
23
d)
23
6
\dfrac{23}{6}
6
23
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