$\"\"$

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The length of the side is $\"\"$ .

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Since $\"\"$ , the length of $\"\"$ .

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In the triangle $\"\"$ .

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The sum of the angles of triangle is $\"\"$ .

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$\"\"$

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The area of the triangle : $\"\"$ .

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For $\"\"$ , the area of the triangle : $\"\"$ .

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$\"\"$

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Thus, the area of the triangle is $\"\"$ .

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Therefore, option B is the correct choice.

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$\"\"$

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Option B is the correct choice.