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10 February, 21:40

In the right triangle shown, D F = E F = 3. How long is D E?

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  1. 10 February, 22:55
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    A^2 + b^2 = c^2

    3^2 + 3^2 = DE ^2

    18 = DE^2

    DE = 4.24 or 3 root 2
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