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Mathematics
Problem
An equilateral triangle has each of its sides of length 4 cm. If
(
x
1
,
y
1
)
,
(
x
2
,
y
2
)
,
(
x
3
,
y
3
)
(x_1, y_1), (x_2, y_2), (x_3, y_3)
(
x
1
,
y
1
)
,
(
x
2
,
y
2
)
,
(
x
3
,
y
3
)
are its vertices, the value of
∣
x
1
y
1
1
x
2
y
2
1
x
3
y
3
1
∣
\begin{vmatrix} x_1 & y_1 & 1 \\ x_2 & y_2 & 1 \\ x_3 & y_3 & 1 \end{vmatrix}
x
1
x
2
x
3
y
1
y
2
y
3
1
1
1
is a. 192 b. 768 c. 1024 d. 128
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