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joe walked 4 miles north, 9 miles east then 8 miles north and 7 miles east if Al decides to walk straight back to where he started how far must he walk?

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    He walked a total of 12 miles north and 16 miles east.

    The Pythagorean Theorem will show the distance of the diagonal back to where he started.

    12^2 + 16^2 = c^2

    Solve for c.

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