Respuesta :

Answer:

50°

Step-by-step explanation:

[tex]m\angle RST = \frac{1}{2} \times (150\degree - 50\degree) \\\\

m\angle RST = \frac{1}{2} \times 100\degree \\\\

\purple{ \bold{m\angle RST =50\degree}} \\\\[/tex]