Use photo math it will help
The measure of the angle formed by 2 chords that intersect inside the circle is 1/2 the sum of the chords' intercepted arcs.
m∠RST = (143+33)/2 = 176/2 = 88°
I think NO 1. is C.2/3 and i think NO 2. is C. 2/5
if im wrong correct me but have a blessed day/night
=)
Answer:
I think the answer is 9 , not sure but I really think so