$\"\"$

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The length of a = 7, b = 4 and hypotenuse c = ?.

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Apply pythagorean theorem: $\"\"$ .

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$\"\"$ (Substitute a = 7, and b = 4)

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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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$\"\"$

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The positive value of $\"\"$ . $\"\"$

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The hypotenuse of $\"\"$ .