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DeltaABC and DeltaDEF are equilateral tr...

`DeltaABC and DeltaDEF` are equilateral triangles. If `A(DeltaABC) :A(DeltaDEF)=1:2` and AB=4 , then what is the length of DE ?

A

`2sqrt(2)`

B

4

C

8

D

`4sqrt(2)`

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Knowledge Check

  • Choose the correct alternative. DeltaABC and DeltaPQR are equilateral triangles. If A(DeltaABC) : A(DeltaPQR) = 1 : 16, and AB = 2 cm, then what is the length of PR?

    A
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    B
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    D
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    D
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    A
    2 cm
    B
    3 cm
    C
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    D
    9 cm

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