The unfolded angle is divided into three equal parts to find the angle between the sectrices of the extreme angles.

Since the degree measure of this angle is 180 °, each of the resulting angles is 180/3 = 60 °. The property of a bisector to halve an angle. Let’s answer the question of the problem and find the degree measure of the angle that is between them.

30 + 60 + 30 = 120 °.

Answer: It is 120 °.



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