If the angles of a triangle are \( 30^{\circ} \) and \( 45^{\circ} \), and the included side is ...

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If the angles of a triangle are \( 30^{\circ} \) and \( 45^{\circ} \), and the included side is \( (\sqrt{3}+1) \) \( \mathrm{cm} \), then the area of the triangle is :
\( \mathrm{P} \)
(A) \( \frac{1}{2}(\sqrt{3}-1) \)
(B) \( \frac{1}{2}(\sqrt{3}+1) \)
W
(C) \( \sqrt{3}+1 \)
(D) \( 2(\sqrt{3}+1) \)
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