A = (6, 2)
B = (12, 2)
f = Segment(A, B)
B' = Rotate(B, 90°, A)
α = Angle(B, A, B')
g = Segment(B', A)
h = Segment(B', B)
c = Circle(B', A, B)
C = Point(c)
i = Segment(A, C)
j = Segment(C, B)
β = Angle(A, C, B)
D = (-5.003916265806213, 5.363535542325036)
E = Point(Circle[D, 6])
k = Segment(D, E)
F = Point(Circle[D, 7])
l = Segment(D, F)