Answer:
-8 I believe
Step-by-step explanation:
The inscribed angle is always half of the central angle.
So 60÷2=30
From this picture you can calculate coordinates of triangles' vertices:

.
Since
you can conclude that points A, B, C are rotated by

about the point (-0.5,0) to form points J, G, H, respectively.
Answer: A is correct choice.
Answer:
Quadrant IV is always in the bottom right corner.