need help pls explain

Answer:
Step-by-step explanation:
WY is the diameter.
WX and XY sum to 180° as half the circle.
Central angle is equal to intercepted arc:
Correct choice is C
Answer:
option C.93° is your answer
Step-by-step explanation:
<WVX+87°=180 linear pair
arc WX=180-87=93°