Step 1 :

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The three sides are $\"\"$ . Law of cosines for $\"\"$ : $\"\"$ .

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Substitute the values $\"\"$ in above equation.

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$\"\"$

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$\"\"$

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$\"\"$ .

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Step 2 :

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Law of cosines for $\"\"$ : $\"\"$ .

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Substitute corresponding values.

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$\"\"$

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$\"\"$

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$\"\"$ .

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Step 3 :

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Law of cosines for $\"\"$ : $\"\"$ .

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Substitute corresponding values.

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$\"\"$

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$\"\"$

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$\"\"$ .

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Solution :

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