hoekbl = 0.3490658503988659 rad (slider from 0 to 30°, step °)
A = (-9, -13)
straal = 3 (slider from 0 to 5, step 0.1)
c = Circle(A, straal)
B = Point(c)
hoekge = 2.007128639793479 rad (slider from 0 to 180°, step °)
B' = Rotate(B, hoekge, A)
A_1 = (-1, -13)
c_1 = Circle(A_1, straal)
B_1 = Point(c_1)
δ = Angle(B, A, B')
D = Rotate(B_1, δ, A_1)
E = Rotate(B', hoekbl, A)
d = CircleArc(A_1, D, B_1)
q = CircleArc(A, E, B)
C = Point(q)
f = Segment(B, C)
C_1 = Point(d)
f_1 = Segment(B_1, C_1)
i = Segment(B, A)
k = Segment(E, C)
l = Segment(E, A)
j = Segment(A, B')
g = Segment(B', C)
α = Angle(B', C, B)
h = CircleArc(A, B, B')
β = Angle(B_1, A_1, D)
g_1 = Segment(D, C_1)
e = CircleArc(A_1, B_1, D)
m = Segment(B_1, A_1)
n = Segment(A_1, D)
ε = Angle(B_1, C_1, D)
p = CircleArc(A, B', E)
ζ = Angle(E, A, B')
η = Angle(E, C, B')