$\"\"$

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The length of a = 4, $\"\"$ and hypotenuse c = ?.

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Apply pythagorean theorem: $\"\"$ .

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$\"\"$ (Substitute a = 4, and $\"\"$ )

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Evaluate powers: $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Apply square roots property: $\"\"$ then $\"\"$ .

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$\"\"$

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$\"\"$ (Evaluate power: $\"\"$ )

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The positive value of c = 5.2. $\"\"$

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The hypotenuse of $\"\"$ .