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P.o.t.W. #13

■ GDC is allowed ■for SL and HL studentsThe three sides of a triangle have lengths of 3 cm, 7 cm and \(x\) cm. Find all possible values of \(x\) such that the degree measures of the three angles of the triangle are consecutive terms in an arithmetic sequence. For each value of \(x\), find the degree measure of the three angles given exactly or to an accuracy of four significant figures.

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