\"\"

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The lengths of two sides of a right triangle are \"\".

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To find: side b.

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Apply Pythagorean theorem: \"a

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\"\"                         (Substitute 7 for a and 14 for c)

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

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\"\"       (Subtract 49 from each side)

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\"\"                               (Subtract: \"\")

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

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\"\"                  (Write \"\")

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\"\"                               (Cancel square and root)\"\"

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The length of the third side \"\".