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1. $△ A B C$

A. $8 \sqrt{3}$
B. $8 \sqrt{3}$
C. $8 \sqrt{3}$
D. $8 \sqrt{3}$

Answer: Option B

Explanation:

∠ A + ∠ B + ∠ C = 180 ° 45 ° + 75 ° + ∠ B = 180 ° ∠ B = 180 ° - 120 ° ∠ B = 60 ° ∴ ক্ষেত্রফল = \frac{1}{2} ×AB×BC× \sin θ = \frac{1}{2} \times 6 \times 8 \times \sin 60 ° = 24 \times \frac{\sqrt{3}}{2} = 12 \sqrt{3} বর্গ একক

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