The angles in each of two triangles are ...

The angles in each of two triangles are in G.P . The least angle of one of them is three times the least angle in the other , and the sum of the greatest angles is `(4pi)/3` . Find the circular measures of the angles.

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The correct Answer is:

`(pi)/7 ,(2pi)/7,(4pi)/7 and pi/(21),(4pi)/(21),(16pi)/(21)`

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