Answer:
D
Step-by-step explanation:
If two secants intersect to form the vertex of an angle outside a circle and the sides of the angle intercept arcs on the circle, then the measure of the angle is equal to one-half the difference of the measures of the arcs intercepted by the sides of the angle.
So
[tex]85-25=60[/tex]
[tex]\frac{60}{2}=30[/tex]
