$\"\"$

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From the diagram adjacent side = 28 and opposite side = 21.

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Apply Pythagorean identity: $\"\"$

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$\"\"$

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$\"\"$ (Evaluate powers: $\"\"$ )

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$\"\"$

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$\"\"$ (Take square root of each side) \ \

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Hypotenuse = 35 $\"\"$

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Opposite side = 21, adjacent side = 28, and hypotenuse = 35.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ $\"\"$

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The angles are $\"\"$ , $\"\"$ , $\"\"$ ,

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