\"\"

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The side lengths of a right triangle are \"\" ; \"c

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Apply Pythagorean theorem: \"a

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\"\"           (Substitute 12 for a and 16 for b)

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\"\"          (Evaluate powers: \"\")

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\"\"                    (Add: \"\")

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\"\"             (Take square root to each side)

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\"\"              (Write \"\")

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\"\"                        (Cancel sqaure and root)\"\"

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The unknown length \"\".