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Andre45 [30]
3 years ago
7

Consider the figure shown below. How long is DE?

Mathematics
1 answer:
Pie3 years ago
3 0

Answer:

c). 2\sqrt{2}

Step-by-step explanation:

It's a right triangle with equal sides (DE == EF).

We know that

4^2 = DE^2 + EF^2 = 2\cdot DE^2\\16 = 2\cdot DE^2\\8 = DE^2\\4\cdot2 = DE^2\\2\sqrt{2} = DE\textrm{; because }-2\sqrt{2} = DE\textrm{ doesn't make sense in geometry}

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Marianna [84]

Answer:

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Step-by-step explanation:

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dimulka [17.4K]
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3 years ago
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Answer:

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