Answer:
∠ U = 27°
Step-by-step explanation:
The inscribed angle S is half the measure of its intercepted arc, thus
arc RT = 2 × ∠ U = 2 × 33³ = 66°
The secant- tangent angle U is half the measure of the difference of the measures of the intercepted arcs, that is
∠ U = 0.5( RS - RT) = 0.5(120 - 66)° = 0.5 ×54° = 27°
