$\"\"$

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The equilateral triangle with sides $\"\"$ .

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Find the area of the shaded region of $\"\"$ :

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The area of equillateral triangle is $\"\"$

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$\"\"$

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$\"\"$ then $\"\"$ in $\"\"$ .

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Area of the shaded $\"\"$ is $\"\"$ .

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$\"\"$

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Substitute $\"\"$ and $\"\"$ in area of the triangle.

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$\"\"$

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The shaded area of the equilateral triangle $\"\"$ is $\"\"$ .

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Similarly area of the equillateral triangle $\"\"$ and $\"\"$ is $\"\"$ .

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Hence area of the shaded region is sum of area of triangle $\"\"$ , $\"\"$ and $\"\"$ .

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Area of the shaded region : $\"\"$

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Area of the shaded region is $\"\"$ .

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Correct option is $\"\"$ .

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$\"\"$

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Correct option is $\"\"$ .