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In a DeltaABC, a =1 and the perrimeter i...

In a `DeltaABC, a =1` and the perrimeter is six times the AM of the since of the angles.The measure of `angle A` is

A

`(pi)/(3)`

B

`(pi)/(2)`

C

`(pi)/(6)`

D

`(pi)/(4)`

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