Respuesta :

Answer:

35°

Step-by-step explanation:

By the property of intersecting secants outside of a circle.

[tex] m\angle C = \frac{1}{2} \times (100° - 30°)\\\\

m\angle C = \frac{1}{2} \times 70°\\\\

\huge \red {\boxed {m\angle C = 35°}} [/tex]