\"\"

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

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To find: side c.

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Apply Pythagorean theorem: \"a

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\"\"           (Substitute 84 for a and 80 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 length of the third side \"\".