$\"\"$

The sides of the triangle is $\"\"$ , $\"\"$ and $\"\"$ .

Law of cosines $\"\"$ .

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Law of cosines $\"\"$ .

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The sum of angles in a triangle is $\"\"$ .

$\"\"$

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

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