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31 March, 16:12

In the right triangle shown DF=EF=3. How long is DE?

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Answers (2)
  1. 31 March, 16:22
    0
    4.24

    Step-by-step explanation:

    To solve this, use the Pythagorean therom. A^2 + b^2 = C^2

    in this case a = 3 and b = 3

    so 9 + 9 = sqrt 18

    4.24
  2. 31 March, 16:24
    0
    Answer:3√ (2)

    Step-by-step explanation:

    DF=3

    EF=3

    DE=√ (3^2 + 3^2)

    DE=√ (3x3 + 3x3)

    DE=√ (9+9)

    DE=√ (18)

    DE=√ (2 x 9)

    DE=√ (2) x √ (9)

    DE=√ (2) x 3

    DE=3√ (2)
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