In triangle \(RST,\) shown above, \(\angle RTS = 30^{\circ}\) and \(\angle RST = 15^{\circ}.\) What is the length of

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In triangle \(RST,\) shown above, \(\angle RTS = 30^{\circ}\) and \(\angle RST = 15^{\circ}.\) What is the length of \(ST?\)

A. 6
B. 12
C. 24
D. 36
E. 72

Answer: B

Source: Princeton Review
Source: — Problem Solving |