(2)

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Observe the net diagram :

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The length of the triangular prism is $\"\"$ .

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The breadth of the triangular prism is $\"\"$ .

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The height of the triangular prism is $\"\"$ .

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The slant height of the triangular prism is $\"\"$ .

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Redraw the net in 3D view :

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$\"image\"$

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(3)

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The length of the triangular prism is $\"\"$ .

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The breadth of the triangular prism is $\"\"$ .

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The height of the triangular prism is $\"\"$ .

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The slant height of the triangular prism is $\"\"$ .

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The surface area of the triangular prism is $\"\"$ .

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Substitute $\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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The surface area of the triangular prism is $\"\"$ .

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