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Choose the correct alternative. DeltaAB...

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?

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The correct Answer is:
` 4sqrt2 `
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