Answer:
The answer is the first one.
Answer:

Step-by-step explanation:
we know that
The area of a circle is equal to

we have

substitute

Remember that a central angle of
subtends for the area of a complete circle
so
by proportion
Find the area of the circle for a central angle of 

I believe D, but I am unfamiliar with this particular terminology
Dont cheat do it your self
Answer:
Step-by-step explanation:
x = 8