0 represents nothing so if you have 5 apples you ate 5 of them you have nothing left.
The external angle between the secants (20°) is half the difference of the intercepted arcs.
(75° - B)/2 = 20°
75° - B = 40°
75° - 40° = B = 35°
Answer:
I think it is b or d I'm not sure though
