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Mathematics, 06.04.2020 22:20 belindajolete

Circle O is shown. Tangents C B and A B intersect at point B outside of the circle. The measure of the first arc formed is 150 degrees, and the measure of the second arc formed is 210 degrees.
In the diagram of circle O, what is the measure of ?

30°
40°
50°
60°

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