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Question 1
If A, B and C is three angles of a ΔABC, whose area is Δ. Let a, b and c be the sides opposite to the angles A, B and C respectively. Is $s=\frac{a+b+c}{2}=6$, then the product $\frac{1}{3} s^{2} (s-a)(s-b)(s-c)$ is equal to
A.
$2 \Delta$
B.
$2 \Delta^{2}$
C.
$\sqrt{2} \Delta$
D.
$\Delta^{2}$
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