Answer:
120 degrees
Explanation:
Angle U is the inscribed angle of arc TV. Since an inscribed angle is always half the measure of its intercepted arc and here, the intercepted arc is TV, then we know that TV = 2 * 30 = 60 degrees.
Arc TU is just half the circle, so it's 180 degrees. Arc TV + Arc VU = Arc TU. We know that Arc TU = 180 and Arc TV = 60, so Arc VU = 180 - 60 = 120 degrees.
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