ABC and DEF are equilateral triangles. If area of triangles ABC : DEF = 1:2 and AB = 4, find DE.

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ABC and DEF are equilateral triangles., If area of triangles ABC : Area of triangle DEF = 1:2 and AB = 4, find DE.
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  5. ABC and DEF are equilateral triangles.
  6. If A(triangles ABC) : A ( triangle DEF) = 1:2 and AB = 4
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