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In an equilateral triangle DeltaPQR, PT ...

In an equilateral triangle `DeltaPQR, PT` is an altitude. Then the value of `4PT^(2)` is:

A

`3PQ^(2)`

B

`(PQ+QR)^(2)`

C

`PQ^(2)`

D

`2PQ^(2)`

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The correct Answer is:
A
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