Answer:
one
if two segment line be on circle .angle between ABC is always half angle center point .
two .
[tex] {x}^{2} + {y}^{2} = 4[/tex]
cener point (0,0) and radius 2
[tex] ({x - 2})^{2} + {y}^{2} = 4[/tex]
shift to right 2 units and radius 2.
center point (2,0)
[tex]( {x - 2 })^{2} +( {y + 3})^{2} = 4[/tex]
shift to right 2 units and transfer down 3 unit
center point(2,-3) and radius 2
