$\"\"$

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The length of patio is $\"\"$ .

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The left side of roof is $\"\"$ of angle of elevaton.

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The rightside angle is $\"\"$ .

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Draw the triangle with above specifications :

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$\"\"$

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

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

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The two angles are $\"\"$ and $\"\"$ .

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The remaining angle $\"\"$ .

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Law of sines : $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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Law of sines : $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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The left and right sides of the roof are $\"\"$ and $\"\"$ .

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The angle at which the two sides are meet is $\"\"$ .

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$\"\"$

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The left and right sides of the roof are $\"\"$ and $\"\"$ .

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The angle at which the two sides are meet is $\"\"$ .