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Solve the following triangle ΔDEF: (angle)E = 90°, e = 28.2cm, f = 17.3cm?

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Solve the following triangle

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  1. Use sine rule to get F:

    sin E/e = sin F/f

    1/28.2 = sin F/17.3

    sin F = 17.3/28.2

    F = 37.84º

    Use Pythagoras to get d:

    d = √(82.2² - 17.3²)

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