$\scalebox{3} {%n}$

$a$

$a$

$\,?$
$\Rightarrow$

A = (11.58534691524121, 4.64945223909283)
B = (12.80003075148953, 2.3277147799346536)
c = Circle(A, B)
f = Ray(B, A)
C = Intersect(c, f, 2)
g = OrthogonalLine(A, f)
D = Intersect(c, g, 1)
E = Intersect(c, g, 2)
h = Segment(C, D)
i = Segment(D, B)
j = Segment(C, E)
k = Segment(E, B)
distanceAB = Distance(A, B)
TextAB: Name[A] + (Name[B]) + " = " + distanceAB
α = Angle(C, D, B)
β = Angle(B, E, C)
γ = Angle(E, C, D)
δ = Angle(D, B, E)
l = OrthogonalLine(A, yAxis)
O = Point(l)
d = Circle(O, distanceAB)
F = Intersect(c, i, 1)